Reggie,
Thanks for the additional pictures and info.
The numbered toggle pin was added during work on this gun sometime after 1932. The edge number on the takedown suggests that this is the actual part after all.
Breechblocks of Alphabet Commercials are commonly found with a number different from the serial number on their rear face. At this juncture the reason is unknown.
e/655 on the barrel makes much more sense. It would be interestng to know what the eagle by the barrel guage looks like.
--Dwight
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