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Objective Dating Table

The following table lists those objectives examined to date. There really is not enough data here to arrive at any sort of conclusion. The key to arriving at a reasonable dating system is more data. It certainly looks as if batches of numbers were released for particular styles of objective, but the batches not in number/chronological order, though the objectives within each batch probably are in chronological order.
The column representing the Name Inscription has the following codes used:-
  • A - W. Watson & Son
  • B - W. Watson & Sons
  • C - W. Watson & Sons Ltd
  • D - Overlapping Ws
  • E - WATSON
  • N - No inscription
  • U - Unknown (not examined)

Objective Number
Working distance
Type
Date (if known)
Name
Notes
300 8mm N.A. 0.65 Holos - B Brass. 160mm Tube length
458 16mm Holos - B 250mm Tube Length All Bright Brass
1046 2mm N.A. 1.37 Apo. - C Brass.
1062 1/12" Versalic - C Brass.
1080 1/6 No type - C Bright Brass and nickel - Tapered Style
1107 8mm N.A. 0.65 Apo. - C Brass. 200mm Tube length
1550 1/12 Versalic - C Black/chrome/brass - Tapered Style
2355 2mm oil Imm. Holos - C Brass and Nickel
2378 1/12th Holos - C Brass and Nickel
2416 x40 NA .65 Para - E Service III
3098 O.I. x100 Para 1.30 PHASE - E Service III
3657 4mm Holos 11th August 1941 C All bright Brass
3658 1/6" - - C Brass. Metalurgical
3661 x40 N.A. 0.65 Para - E Phase,green ring, short.
3684 1/6" N.A. 0.74 Para - C Brass/Chrome. Tapered
4314 1/12 Versalic - C Black and Chrome - Tapered Style
4582 1/6 Para - D Black and Nickel[HC]
4969 x40 Para 0.65 - E Service III
5036 1/6 Para - - Black and Brass
5288 x40 NA .65 Para - E Service III
5352 O.I. x100 NA 1.30 Para - E Service III
5588 1/6" Para - D Brass/Chrome.
5594 1/6" Para - D Brass/Chrome.
6135 x100 N.A. 1.30 Para - E Oil, red ring.
6445 25mm Holos 11th August 1941 C All bright Brass
7212 1/6" N.A. 0.74 Para - C Brass/Chrome. Tapered
7248 1/6" Para - D Brass/Chrome. Tapered
7355 16mm Holos 11th August 1941 C All bright Brass
8545 16mm Holos - C All Bright Brass
8649 4mm N.A. 0.95 Holos - C Brass. 160mm Tube length
9073 x60 N.A. 0.85 Para - E Gold ring.
9108 1/6 Para - D Brass and Nickel
9183 1/12 Utility - - -
9276 2in. Holos - C All Bright Brass
9317 1/12 oi Utility - U -
9635 1/6 Para - D Brass and Chrome
9924 1/12" OI Utility - D Black and Chrome
10133 1/12 Utility - D Black and Chrome
10240 1/6th Para - - -
10552 1/12in. Utility - D Black & Chrome- Tapered pattern
10561 1/12" Utility - D Black/Chrome. Oil. Corr. Collar
10564 1/12" N.A. 1.25 Utility - - Black/Chrome.
10638 1/4 Para - D Black and Nickel[HC]
10830 1/12 Para 7th October 1946 U -
11663 2in. Para - C All Black - Tapered pattern
11690 1/12in. Utility - D Black & Chrome- Tapered pattern
11933 x96 1/12" N.A. 1.25 Utility - - Black/Chrome. Oil
12238 1/12" OI Versalic - C Black and Chrome
12495 x40 NA .65 Para Phase - E MicroSystem 70
12667 x40 N.A. 0.85 Apo - D Turquoise ring.
12790 x40 N.A. 0.65 Para - D Phase, green ring.
12845 1/12" OI Versalic - C Black and Chrome
12988 oil x100 NA 1.30 Para - E Service III
13192 1/6" N.A. 0.70 Para - D Brass.
13290 oil x90 NA 1.30 Fluorite Phase - E MicroSystem 70
13305 x40 Para - D MicroSystem 70
13462 x100 N.A. 1.30 Para - D Oil, red ring.
13615 16mm. N.A. .28 - - - Black and Brass
13679 4mm. N.A. .70 - - - Black and Brass
13764 oil x90 NA 1.30 Fluorite Phase - E MicroSystem 70
14354 1/6" N.A. 0.70 Para - D Brass. Tapered
14695 1/12 oil. imm. Versalic - - -
14768 x40 na. .63 Para - D Microsystem 70
14936 1/12" Versalic - C Black/Chrome. Oil.
15069 x100 N.A. 1.30 Para - D Oil, red ring.
15195 x90 na. 1.3 oil Fluorite - D Microsystem 70
15498 2/3 Para 30th September 1930 U -
15504 1/6 Para 30th September 1930 C -
15718 1/12 oil imm. Versalic - C Black and Nickel with iris
15743 x90 N.A. 1.37 Apo - D Oil, red ring.
16153 2/3rds Para - - -
16456 oil x100 NA 1.30 Para - E MicroSystem 70
16640 1/12" OI Versalic - C Black and Chrome
16642 1/12" OI Versalic - C Black and Chrome
16648 1/12" OI Versalic - C Black and Chrome
16874 1/12" OI Versalic - C Black and Chrome
16876 1/12" OI Versalic - C Black and Chrome
16877 1/12" OI Versalic - C Black and Chrome
16880 1/12" OI Versalic - C Black and Chrome
16939 1/12" OI Versalic - C Black and Chrome
16940 1/12" OI Versalic - C Black and Chrome
16997 1/12" OI Versalic - C Black and Chrome
17001 1/12" OI Versalic - C Black and Chrome
17116 2/3 in. Para 26th November 1934 - -
17223 1/12" OI Versalic - C Black and Chrome
17249 1/12" OI Versalic - C Black and Chrome
17269 1/12" OI Versalic - C Black and Chrome
17274 1/12" OI Versalic - C Black and Chrome
17559 1/12" OI Versalic - C Black and Chrome
17602 1/12" OI Versalic - C Black and Chrome
17935 1/6 in. Para 26th November 1934 - -
17949 x50 N.A. 0.95 Fluo. - D Oil, phase gold ring.
18004 1/6 Para 10th September 1935 C Black and Chrome - Tapered Style
18018 1/12" OI Versalic - C Black and Chrome
18097 1/12" OI Versalic - C Black and Chrome
18158 1/12" OI Versalic - C Black and Chrome
18172 1/12 Oil 24th May 1946 C Black and Chrome - Tapered Style
18197 2/3 Para 10th September 1935 C Black and Chrome - Tapered Style
18333 oil x90 NA 1.30 Fluorite - E MicroSystem 70
18376 x90 N.A. 1.30 Fluo. - D Oil, red ring.
18587 1/6 in. Para 22nd November 1935 - Black and Brass
18705 2/3 in. Para 22nd November 1935 - Black and Brass
19634 x40 NA .65 Para - E MicroSystem 70
20475 x40 Phase Para - E Microsystem 70
20695 1/12 Para 26th April 1949 U -
20755 1/12" OI Versalic - C Black and Chrome
20756 1/12" OI Versalic - C Black and Chrome
20757 1/12" OI Versalic - C Black and Chrome
20763 1/12" OI Versalic - C Black and Chrome
21685 1/12 oil imm. Versalic - C Black and Chrome - Tapered Style
21695 1/6" N.A. 0.70 Para - - Brass.
22043 1/6" N.A. 0.70 Para - D Brass. Tapered
22074 2/3" Para - D Brass.
22173 1/12 oil imm. Versalic Metallurgy - C Black and Chrome - Short - Tapered Style
22272 1/12" OI Versalic - C Black and Chrome
22809 x100 N.A. 1.30 Para - D Oil, red ring.
24920 2/3 Para - D Brass and Chrome - Tapered Style
25367 1/6 Para - D All Bright Brass - Tapered Style
26312 2/3" Para - - Brass/Chrome.
26816 1/6 Para 2nd January 1941 - -
27014 2/3 Para 2nd January 1941 - -
32327 2/3 Para - D Brass and Nickel
32976 1/6 Para - D All Bright Brass
33144 2/3 Para - D Brass and nickel
34632 2/3" Para - D Brass/Chrome.
35281 2/3 Para - D Brass and nickel
36636 2/3 Para 24th May 1946 D -
36751 1/6 Para 24th May 1946 D Black and Chrome - Tapered Style
38381 2/3 Para - D Black and Chrome - Tapered Pattern
38978 1/6 Para - D Black and Chrome - Tapered Pattern
39613 X42 na .20 Para - U -
39646 1/6 Para - D Black and Brass - Tapered Pattern
40320 2/3 x10 na .28 Para - U -
41119 1/6 Para - D Black and Chrome - Tapered Style
41081 1/6 Para - D Black and Chrome - Tapered Style
42019 2/3 Para - D Black and Chrome - Tapered Style
42121 1/6 Para - D Black and Chrome - Tapered Style
42187 16mm Para 29th May 1959 U -
42249 1/6 Para 12th February 1948 U -
42572 40mm Para - E Black and Chrome Service II style
43293 16mm Para - E Black and Chrome - Service II style
44204 4mm Para - E Black and Chrome - Service II style
44520 40mm Para - E Purple and Chrome - Bactil 60
44986 16mm Para - E Purple and Chrome - Bactil 60
45036 4mm Para - E Purple and Chrome - Bactil 60
45138 4mm Para 18.3.60 - .
45482 2mm Para - U -
46235 1/6 Para - D Black and Chrome - Tapered Pattern
46236 1/6 Para 14th December 1948 U Black and Chrome - Tapered Pattern
46287 40mm Para - E Black and Chrome Service II style
47324 2mm x100 Para - E Chrome Service II style
47522 1/6 Para 26th April 1949 U -
47855 x10 Para - U -
48217 2/3 Para 26th April 1949 U -
48444 2/3 Para 12th February 1948 U -
48676 x40 4mm N.A. 0.70 Para 26.10.60 - .
48812 x4 40mm N.A. 0.13 - 26.10.60 E Black/Chrome.
50545 1/6 Para - D Black and Chrome Tapered Style
51715 4mm Para - E Black and Chrome Service II style
51779 4mm Para - E Black and Chrome Service II style
52148 40mm Para - E Black and Chrome Service II style
52506 1/6 Para Metallurgy 22mm tube length - D Black and Chrome - Tapered Style - Short
54867 16mm Para - E Black and Chrome Service II style
55302 16mm Para - E Black and Chrome Service II style
56474 40mm Para - E Black and Chrome Service II style
57763 1/6 Para 7th October 1946 U -
88657 x10 Para - U -
99590 x42 1/6" N.A. 0.70 Para - D Black/Chrome.
111224 4mm Holos - C All Silver Nickel
132360 x5 Stereo Objectives - - N Grey, bayonet fitting. These objectives usually bear the same number as the stand they were supplied on, so it may be assumed that a Stereo stand existed with this number and such a stand number has been entered into the preceding table.
134678 x5 Stereo Objectives - - N Grey, bayonet fitting. These objectives usually bear the same number as the stand they were supplied on, so it may be assumed that a Stereo stand existed with this number and such a stand number has been entered into the preceding table.
165624 1/6 Argus - D Black and nickel - Tapered Pattern
181133 1/6 Argus - D All black - Tapered Pattern
181137 1/6 Argus - D All black - Tapered Pattern
181140 1/6 Argus - D All black - Tapered Pattern
181142 1/6 Argus - D All black - Tapered Pattern
181162 2/3 Argus - D All black - Tapered Pattern
184067 1/6 Argus - - -
186346 2/3" - 11.3.37 - .
188612 1/6 Argus - D All black - Tapered Pattern
189167 1/6 Argus - D All Black - Tapered pattern
190759 2/3" Argus - D Black/Chrome.
193658 2/3 Argus - D All Black - Tapered pattern
197893 1/6 Para - D Black and Chrome - Tapered pattern
198575 1/6" N.A. 0.70 - - D Black/Chrome.
198875 2/3 Para - D Black and Chrome - Tapered pattern
198886 2/3 Para 14th December 1948 U Black and Chrome - Tapered pattern
200835 2/3 Para - D Black and Chrome - Tapered pattern
319763 x40 Para - U -
499693 x10 NA .30 Para - E Short, all chrome with coloured ring
516318 x10 NA .30 Para - E Short, all chrome with coloured ring
525362 oil x100 1.28 Para - E All chrome with coloured ring [HC]
557452 x45 NA.0.65 Para - E All chrome with coloured ring [HC]
557908 Oil x100 Para 1.28 - E All chrome with coloured ring
569813 x10 N.A. 0.30 - - - Chrome. Blue ring
571878 oil x100 NA 1.28 Para - E Short, all chrome with coloured ring
B1188 x50 4mm N.A. 0.70 Para - E Black/Chrome.
B1523 25mm Para 5.1.51 - .
B1619 x4 40mm N.A. 0.13 - - E .
B2385 6mm Para 5.1.51 - .
B3391 16mm Para - U Associated with stand 103692 (1950)
B4236 4mm Para - U Associated with stand 103692 (1950)
B5663 2mm Para 25th July 1951 U -
B5665 2mm Para - U -
B5667 2mm Para - U -
B5675 2mm Para 25th July 1951 U -
B5800 2mm Para - U -
B7173 2/3 Para 7th October 1946 U -
B7400 4mm Para 25th July 1951 U -
B7408 4mm Para 25th July 1951 U -
B8330 16mm Para - E Black and Chrome - Service II style
B8613 2mm Para - U -
B9223 16mm Para 25th July 1951 U -
B9226 16mm Para 25th July 1951 U -
B9273 40mm Para 25th July 1951 U -
B9315 40mm Para 25th July 1951 U -
B9495 4mm Para 13th November 1952 U -
B9614 40mm Para 13th November 1952 U -
B10328 x40 4mm N.A. 0.70 - - E .
B10775 x40 Para - U -
B10861 4mm Para - E Black and Chrome - Service II style
B10984 16mm Para 13th November 1952 U -
B11320 16mm Para - E Black and Chrome - Service II style
B11806 4mm Para - E Black and Chrome - Service II style
B12912 4mm Para Metall. - E Black and Chrome - Service II style
B13109 4mm Para 30th September 1952 E Black and Chrome - Service II style
B13190 x40 4mm N.A. 0.70 Para - E Black/Chrome.
B13832 16mm Para - E Black and Chrome - Service II style
B14008 2mm Para 30th September 1952 E Black and Chrome - Service II style
B14281 2mm Para - U -
B14565 16mm Para 30th September 1952 E Black and Chrome - Service II style
B14621 x10 16mm N.A. 0.28 Para - E Black/Chrome.
B14741 40mm Para 5th August 1953 U -
B16329 x6 25mm N.A. 0.21 - - - Black/Chrome.
B16755 4mm Para - E Black and Chrome - Service II style
B17932 2mm Para 5th August 1953 U -
B18033 4mm Para 5th August 1953 U -
B18658 16mm Para 5th August 1953 U -
B19768 4mm Para - E Black and Chrome - Service II style
B21559 4mm Para - E Black and Chrome - Service II style
B21587 4mm Para 2nd September 1954 E Black and Chrome - Service II style
B21643 16mm Para - E Black and Chrome - Service II style
B21814 2mm Para 2nd September 1954 E Black and Chrome - Service II style
B21860 16mm Para 2nd September 1954 E Black and Chrome - Service II style
B23132 4mm Para - E Black and Chrome - Service II style
B24260 40mm Para - E Black and Chrome - Service II style
B24344 2mm Para 19.1.55 - .
B24434 4mm Para 19.1.55 - .
B24763 16mm Para 19.1.55 - .
B26422 x40 Para 1956 - Black and Chrome - Service II style
B28728 x4 40mm N.A. 0.13 - - E .
B29103 40mm Para 11th May 1956 U -
B29258 x4 40mm N.A. 0.13 - - E .
B29464 4mm Para 11th May 1956 U -
B29602 x100 oi Para - U -
B29744 2mm Para 11th May 1956 U -
B29774 50mm Para - E Black and Chrome Service II style
B30308 16mm Para 11th May 1956 U -
B30487 x10 Para 1956 - Black and Chrome - Service II style
B30851 2mm Para 10th August 1956 U -
B31029 4mm Para 10th August 1956 U -
B31412 16mm Para 10th August 1956 U -
B31953 2mm Para - E Chrome Service II style
B32211 16mm Para - E Black and Chrome - Service II style
B32816 4mm Para - E Black and Chrome - Service II style
B33309 25mm Para - E Black and Chrome - Service II style
B33445 22mm Para - E Black and Chrome Service II style
B33547 2mm Para - E Chrome Service II style
B33569 2mm Para - E Chrome Service II style
B33570 2mm Para - E Chrome Service II style
B33582 2mm Para - E Chrome Service II style
B33610 2mm Para - E Chrome Service II style
B33619 2mm Para - E Chrome Service II style
B33634 2mm Para - E Chrome Service II style
B33646 2mm Para - E Chrome Service II style
B33649 2mm Para - E Chrome Service II style
B33862 2mm Para - E Chrome Service II style
B34719 2mm Para - E Chrome Service II style
B34741 2mm Para - E Chrome Service II style
B37878 2mm Para 29th May 1959 U -
B38447 x40 4mm N.A. 0.70 - - E .
B41314 4mm Para 29th May 1959 U -
C5105 2mm Para - - All steel - Service II style [HC]
C7854 4mm Para - E Chrome - Service II style
C8318 4mm N.A. 0.70 Para - E .
C10292 4mm Para - E Chrome - Service II style
C10586 2mm Para - E Chrome - Service II style
C10588 2mm Para - E Chrome - Service II style
C10593 2mm Para - E Chrome - Service II style
E1293 2mm Fluo. 18.3.60 - .
E1467 x10 16mm N.A. 0.30 Para - - Black/Chrome.
E3648 x50 3.6mm N.A. 0.95 - - E Chrome. Oil. Fluorite
E3762 x90 2mm N.A. 1.30 - - E Chrome. Oil. Fluorite
E3819 3.6mm Fluorite - E -
E3886 3.6mm Fluorite x50 Oil. Imm. NA .95 - E -
E3944 16mm Fluo. 18.3.60 - .
E3972 16mm Fluo. 18.3.60 - System 70 type.