Here's a Schneider Radionar 3.5/7.5cm.

Standard lens made for Reflex Korelle with M41 screw mount.

Serial number: 757235, made in the mid 30's.

Good condition, with signs of moderate to normal use on barrel, some pitting to the focusing ring.

Optics is in good condition, with some dust, haze and a few minor cleaning marks on front element.

Please have a look at my other auctions for more items, - I'd happily combine shipping costs.
Good luck!