Thank you, twice, Toby. I assumed the lock plate was flat beneath the tumbler, but wondered if the bolster was a separate press fit affair, like a cap with a shoulder, that was dressed off flush on the inside .............. or if it was actually part of the lock plate itself.

I really like the scallop on the rear of the lock plate on the other gun you pictured. Reminiscent of some m/l lock "tails" I have seen, but much more ornate.

Best, SRH

May God bless America and those who defend her.