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Other Instrument Numbers
This section has been included at the instigation of a regular contributor to these pages Hugh Clayton [HC]. He has encountered a number of other instruments manufactured by Watson, bearing serial numbers. This section is included in the hope that some sort of relationship might eventually be established between various departments numbering systems.

See also The objective list Return to Microscope Serial Nos.

Instrument Number
Model/Type
Date (if known)
Notes
- English Target Pistol - Marked on top of barrel - 'W. Watson & Sons, 308 & 313 High Holborn, London'. Marked on side of frame 'W. Tranters patent 62097'. [HC]
884 3 inch Refractor Telescope - [HC]
1250 3 inch Refractor Telescope - Built-in table stand [HC]
1345 Student Telescope - 4ft long. Mahogany tripod [CG]
2221 5 inch 'Century' Refractor Telescope - Keele University [HC]
2467 Camera Lens - W. Watson & Sons London. 3.9 inch f11.3 Holos wide-angle (Brass) [HC]
2489 Compass - [HC]
2539 Camera Lens - W. Watson & Sons London. 51/8inch Holostigmat Coated Ser. 1A.2539. Front and Back assembly removable 8 inch/Ilex shutter 51/8 inch/f4.6-f45 or 8/f8.5-f64 with Acme Speed Dial 1-1/300 (8 speed), T&B plus Cap plus Locking ring. DA Socket. Black/Chrome/Nickel.[HC]
4763 Marine Telescope - W. Watson & Sons. [HC]
7431 Binoculars 6x30 - W. Watson & Sons (Opticians to H.M. Government) x6 [HC]
7437 WWII Military x6 Binoculars - W. Watson & Sons Ltd. London. Case Marked with Holborn address and Optician to HM Government [HC]
61296 Binoculars 1917 W. Watson & Son 1917 Binoculars Prismatic No.3 (Mk I) x6 [HC]
72101 8x30 Binoculars - Marked 'Lynceus x8 W. Watson & Sons London and Barnet'. [HC]