I also have a falling apart little 12-page color H & D Folsom Arms Co. booklet of their Baker Guns that has the same prices as Ken's folder. It only offers the doubles in 12- and 16-gauge. Page 8 is a foldout of the De LUXE GRADE --
De LUXE GRADE foldout.jpeg
with the Superba Grade SBT on the other side.
Trap Gun foldout.jpeg
By these later style Baker catalogs the 20-gauge is included --
00002. 1921.jpg
Will always wonder about these 1928 magazine ad that show the Batavia Leader coming in .410?!?
1928 National Sportsman ads.jpeg