researching leica lens serial# 250544(1935) f2,8 1:63 x50 hektor. asking around (jlager,vienna,forums,tamarkin etc.) no body has seen this engraving on any leicas,i saw one on another forum but it looked scratched on.i've been looking for those distribution/delivery lists but no go.was this a party member or organization that had it engraved?