Now it makes sense. I got the following from another collector / historian in the mail this AM.
A GUNSMITH, LAST NAME SCHAEFFER. BUILT SOME COMBINATION RIFLE SHOTGUN OUTFITS BETWEEN 1873? AND 1882? HE MODIFIED MODEL 1873 MAYNARD CARTRIDGES TO FUNCTION IN HIS GUNS BY TURNING DOWN THE RIM ON THE CARTRIDGE TO REDUCE ITS DIAMETER.
A NUMBER OF YEARS AGO I BOUGHT A COMPLETE SET OF SCHAEFFER RELOADING TOOLS FOR THE 40-70 AND 55 SHOT CARTRIDGES ALONG WITH A DOUBLE HAND FULL OF BOTH THE CALIBERS OF SHELL HE HAD MODIFIED. I SOLD THIS GROUP OF ITEMS TO DUANE RICHARDSON IN SAN ANTIONO, TEXAS THE SAME DAY I BOUGHT THEM. WHERE THEY WENT AFTER HE PASSED ON I HAVE NO IDEA. AS THE ALTERED SHELLS WERE NO LONGER MAYNARD CARTRIDGES I DIDN’T KEEP ANY OF THEM. AT ONE TIME I HAD A LOT OF RESEARCH MATERIAL ON SCHAEFFER AND HIS GUNS BUT HAVEN’T SEEN IT IN YEARS.
Here are two I have cataloged as Schaefer, as can be seen rims are nothing loke the example in the sale. I think RTB had some in his sales.
A .35-30 and a .40-47 Schaefer Maynard.