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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.


Instrument Number
Model/Type
Date (if known)
Notes
- Folding rule and level 1885 Folding Rule and level measuring 6.5 inches x 2 inches (folded). Marked with arrow and W.D. [=War Department] and Watson and Sons, 313 High Holborn London and dated 1885. Inscribed with data relating to the storage of artillery shells, gun calibers, settings for fuses for M.L. rifles [=muzzle loaders] and B.L. rifles [=breech loaders] and calibrations for 9 to 40 pounders. It includes information concerning the burn time of various fuse makes. [GJC]
- 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]
305 Naval Binoculars - Marked 'W. Watson and Sons, Ltd London'
684 Telescope - Astro Refractor about 3ins aperture [HC]
760 Gunsight 1916 Marked 'W. Watson and Sons London 1916 VP 3 to 9.' [HC]
884 3 inch Refractor Telescope - [HC]
975 Magic Lantern - Mahogany and Brass. Marked 'W. Watson and Sons 313 High Holborn London No.975' [HC]
1096 5" Refraction Telescope - Est. focal length 6 feet. Marked 'W. Watson & Sons, 313 High Holborn, London 1096 [AL]
1250 3 inch Refractor Telescope - Built-in table stand [HC]
1345 Student Telescope - 4ft long. Mahogany tripod. W. Watson & Sons Ltd. 313 High Holborn, London. STUDENT [CG]
1398 Student Telescope - W. Watson & Sons Ltd. 313 High Holborn London [JVG]
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]
3122 Binocular - Binocular Prismatic No. 2. Mk I. x6. W. Watson and Son, London. [HC]
3948 Telescope 1918 G.S. Telescope x8 W. Watson & Sons Ltd. London 1918 Pat G310 N218 [GA]
4146 Binoculars - Marked Kynceus x6 Watson and Sons, London and Barnet [HC]
4589 Sighting Telescope - Marked 'W. Watson & Sons Ltd London No.4 Mk.III 4589' [HC]
4642 Gunsight Telescope 1918 Marked 'W. Watson and Sons London 1918(/9) Pat. G340 HB 18
4763 Marine Telescope - W. Watson & Sons. [HC]
5002 Telescope 1918 G.S. Telescope x8 W. Watson & Sons. London 1918 Pat G310 [HC]
5400 Gunsight 1918 Marked 'GS telescope x8 5400 W. Watson & Sons London 1918.' [HC]
6146 Telescope 1916 W. Watson & Sons Ltd. London 1916 Sighting Tel No4 Mark III [HC]
6561 Periscope - Marked '14A MkII x10 W. Watson and Sons Ltd'. [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]
8158 Binoculars - NPL 18 x6 [HC]
12702 Binoculars 1919 Marked ' Prismatic No. 2' 1919 [HC]
13761 Binocular 1915 Marked 6x 1915 Regd 644126 Pat. 23825 (Lt. F. Y. Pearson 38th RE)
15185 Camera - Mahogany and Brass quarter-plate. With Bausch and Lomb lens. [HC]
55568 Binoculars 1917 Binocular Prismatic No.3 Mk.I x6 W. Watson & Sons Ltd. 1917 [HC]
55924 Binoculars 1917 Prismatic No.3. MkI x6. W. Watson and Sons London 1917. Military mark. [HC]
59223 Binoculars 1917 6x30 marked 'W. Watson & Sons Ltd. 1917 Prismatic No. 3 Mk. I' [HC]
59497 Binoculars - Binoculars Prismatic No.3 (Mk II) [JB]
61296 Binoculars 1917 W. Watson & Son 1917 Binoculars Prismatic No.3 (Mk I) x6 [HC]
61440 6x Binocular 1917 Marked 1917 Regd. No. 644526 Pat. 23825 [HC]
61785 6x Binocular 1917 Marked 'W. Watson and Sons London 1917 Binoculars Prismatic No. 3 (MkI) x6 61874 REgd. No. 644526 Pat. No. 23825'
64978 Binoculars 1918 W. Watson & Sons Ltd. London 1918 Binocular Prismatic No.3 MkI x6 [HC]
72101 8x30 Binoculars - Marked 'Lynceus x8 W. Watson & Sons London and Barnet'. [HC]
75437 Monocular - W. Watson & Sons Ltd London and Barnet Perspect x8 9degrees [HC]
75713 Vedet 8x23 Monocular - Marked 'Watson London and Barnet' [HC]
76354 8x22 Vedet Monocular - Marked 'W. Watson & Sons London and Barnet'. [HC]
S1552 Camera Lens - Watson London No.S1552 3in T/1.9" [HC]
24 Sighting Telescope 1916 Marked 'W. Watson & Sons Limited London 1916 No.24 Sighting Tel. No.4 Mark.III' [DJA] The number '24' is probably not a serial number.
84 Sighting Telescope 1911 Marked 'Telescope Sighting No. 7 (Mark I) W. Watson & Sons Limited London 1911 No.84' [DL] The number '84' is probably not a serial number.