From some data I found online it appears I got a little lucky in choosing this one of the two we bought. There were 4 inspectors who stamped the barrels with their initials during production of these Model 1867's.
EB-Edward Barrett
JMBC-JMC Clitz
HE-Henry Erban
WDW-WD Whiting
Of the four, only 8% were inspected by Edward Barrett, and his EB is the rarest of the four. Mine is EB inspected, and has the Navy anchor rollstamp.

Of the 6500 first Model 1865's built, 6358 of those were sent back to Remington to be reworked to centerfire .50 cartridges. It took 6 years to get those guns back from all over the world on Navy ships, or ports and get them reworked. As part of the rework Rem. installed new triggers, and trigger guards, plus a CF breech block. The previous Model 1865's had no trigger guard at all. Barrels were 8.5" on the 1865, and were shortened to 7" at the same time.


All these actions are marked FCW and a P by Remington employee Frank C Warner. The P means it was proof tested.

I will begin the process of making up some cartridges by shortening .50-70 down to .86" case length, and trying to find some correct weight 290-300 grain .512" bullets. In hopes of at least making up enough to shoot it a little.
I've wanted one of the Rolling Block military Army or Navy handguns for a very long time! So this is one I'm really happy to finally add to my collection of old Remingtons!