Igorrock, possibly the high-quality German scopes the Russian used in the Winterwar were neither Zeiss Zielviers nor Hensoldt Dialytans, but scopes made by the Emil Busch AG Optische Werke, Rathenow (sorry, not Berlin, my mistake). The confusion is explainable: Busch cooperated closely with Zeiss. Since the 1930s they got their lenses made by Zeiss and were bought up by Zeiss in 1943. During WW2 Busch produced mainly artillery, fighter and bomber sights as well as rangefinders. WW2 sniper scope production was left to others, mainly Hensoldt, AJACK, Zeiss and many lesser optics makers.