AK&S - A. Kershaw & Sons Ltd. (Soho Ltd) Now google becomes your friend.
Is the red a 'W' about 1/2" high. A red W indicated a scope with better sealing making them more waterproof.
EDIT nubmers of Sniper models produced by maker.
No4MK1 & 1* (T) w/ No32 Mk1 - 1,403 - Enfield
No4Mk1 (T) w/ No32 Mks 1,2 &3 - 23,177 - Holland & Holland (BSA and Longbranch did do some of these)
No4Mk1* (T) w/ C No32 Mk1, 1A, 2,3 & C No67 Mk1 - ~1,000 - Longbranch
No4Mk1* (T) w/ Lyman Alaskan (No32 TP Mk1) - 100 - Longbranch