In response to sigma pete, I attached pictures of my military issue Swift:
Swift Telescope 6650 99 527 7191, Serial Number 85-52829, manufactured in 1985, housed in Case, Telescope 6650 99 527 7084 with original Swift Tripod with pan and tilt head.
Interestingly included with the paperwork for this scope was an instruction sheet for a different variant of Issue Swift Tripod V6/6650 99 527 7083.
The case carries NSN labels and descriptions for both the case and telescope together with 5 - 20mm diameter yellow labels with different ET numbers ('ET 10-13/6' & 'ET 10-14/1') The tripod caries three labels: 'S/N 523', 'Part of Serial No 82-20895' (I assume this was a previous scope this tripod was issued with) and 'ET 15/2 5/3.
These scopes have a variable 15 - 60x zoom with separate focussing knob.
They were issued at the end of the L42 and early L96A1 era's, and were optically very good but didn't stand up to desert conditions very well and were replaced with a
British
variant of the M49.
There were not usually military markings on the issue swifts, other than (occasionally) stick on labels - the same goes for the very 'civilian' case they were issued in...
The images show the one in my collection- exactly as it came from MoD disposal.
Only IDs were small square labels on the tripod and NSN numbers on the case