Hello 4seventy,

Thanks for the reply.

So, here is what I've found out so far. Does all this sound correct?

Any comments or corrections would be appreciated.

JAMIN = Marcel Jamin = Gun Maker
Crown/JF = Jean Falla = Barrel Maker
Acier Martele = Hammer Forged Steel
.450/400 EXPRESS 3-1/4" = Caliber
B.BLINDEE = Proofed with Jacketed Bullet
g = Date Code = 1928
Lion/P.V. = Nitro Proof Mark
*/T = Inspector Mark
*/P = Inspector Mark
10.1 = Bore dia.
958 = Assembly number
1462 = Serial number
Monogram = Unknown ? - perhaps retailer ?