From everything I see, There is no ESHA stamp anywhere on the frame or barrels. There is an "A" stamped on the rifle barrel that I missed in my posted pictures. The frame is stamped with a crown over a U and the serial number. The front edge of the frame is stamped with an R on the right side and an L on the left. I will upload more pictures and post asap.

What can I use to clean the lock and engraved areas?