Interesting posts to me. I think the "cut" in the receiver watertable is for the soon to be used "draw lug" that will later appear on all Baker marked guns, but not the Batavia series. In the beginning I think Baker made up frames for the "draw lug" but did not use the complete system early on. I have noted some I have around here and see the progression in bits and pieces.
Baker Hammerless guns 6B and 66B have the frame recess, but no draw lugs in the barrel lug.
Baker No. 45 has a receiver recess and a cross[draw] lug that fits into the recess in the barrel. Early A and B grades seem to be marked with a grade stamp. No. 45 , and others similar, do not have a grade stamp and I think these un-grademarked guns are the first Paragons, started a few years later than the A and B Grades. The Paragons seem to be in a numbering series from 1 to 1150 or so, with anomallies in the numbering of later guns. The A and B grades seem to be in a separate series from 1-7000 plus.
Guns 209B and 238B do not have the frame recess or the extra draw lug through the barrel lug.
Gun 376B has both a frame recess and an extra draw lug through the barrel lug. This detail seems to be present on all subsequent Baker marked guns. Never on Batavia series guns.
