Below is pictured a No.32 Mk.1 British sniper scope from WWII. This was also given to me by John, the same guy who gave me the 50-52 commando knife.The lense covers are post war but they protect the lenses. A special tool was needed to adjust the elevation and lateral adjusting turrets and it was a two man job to zero the scope. Later marks improved on this design because the Mk.1 was so difficult to zero. John.