To complete my no 4 (T) longbranch and in British service until approx 1962 kit, I have acquired a observers scope TEL SCT REGT MK 2S
KEC O.S. 126 G.A. 21975
my question to the forum is how does this scope work? Yes I know its probably simple but all i see is light, dont know how to focus or anything- if it came with a manual I would have read it!! thanks