Kahles 6 x 42 scopes fitted to the C3A1 Canadian sniper rifles and others were defined as follows if this helps in the future:
Measure the telescopic sight tube you have, if it is 26mm diameter it uses the Low or High variant of RALS 4 or RAHS 4 that’s what the L and H stands for.
If it measures and 1” diameter it needs either the RALS3 or the RAHS3 hope that makes sense
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