Ah, a nice little puzzle on a Sauer clamshell 450 with Wilhelm Kelber's script initials on 3 Ring Krupp steel tubes. Now crowns though. I'm curious if the "875.25" on the lower rib is a data string. Probably toward the end of the clamshell era.







Still zero interest in clamshells?? Sauer also made a few scatterguns with clamshell frames.

Kind Regards,

Raimey
rse