On the bottom left of the middle flats photo, I see the Liege proof mark with "12-70" under it. Sanderson's of Portage, I seriously doubt, was importing shotguns (or in business) pre-1900.

http://gerardcox.blogspot.com/2014/06/deciphering-belgian-proof-marks.html

Last edited by David Zincavage; 07/10/21 02:51 PM.