>>William R. Schaefer was located 61 Elm Street, Boston, Mass. Schaefer started his business circa 1853 and made custom shotguns. By 1883 it was Schaefer & Son and they were selling the hammerless (Daly type) double. Schaefer's guns are my favorite of all the custom American Hammer gun makers. William Schaefer is also well known for both making and shooting percussion target rifles. The majority of his doubles show just a little line engraving, or none at all.<<
https://www.doublegunshop.com/forums/ubbthreads.php?ubb=showflat&Number=71942&page=allThere looks to be text on the medallion and on the top rib. I have serious reservations that Schaefer & Sohn contributed any effort as by this time in Schaefer's life he was just a Gunsmith Manager. He just placed an order thru Daly to Lindner or possibly directly to Lindner.
Serbus,
Raimey
rse