This ZF.41 complete set was dug out in Russia, where it was used on the easter front. Some markings are still visible on the mount and carrying can. Interesting fact is that it came with its original knarinol cloth and dust brush (not pictured).
Here is an early Z.F.41 made by Emil Busch A-G in Rathenow (code cxn). The “K.F.” marking (Kältefest) indicates that the scope was lubricated with cold-resistant grease “Invarol”. Early ZF41 sights used flat rollers mounts.
ZF41/1 coded “cxn” for the manufacturer Emil Busch A.-G., Optische Industrie in Rathenow. The “M” marking meaning remains unknown today.