hipwr223,

You certainly picked up a very interesting piece and at one heck of a nice price to boot. For one the use of pins instead of slotted screws in forward portion of the receiver caught my attention as I haven't seen many of them (peculiar to say one maker?) and the stamp in the lower rib just forward of the barrel lugs is something I haven't seen before. I see you have drawn the attention of some very knowledgeable people so please post pictures of every little detail. Coincidently of late there has been quite a bit of discussion as to the origins of the clamshell receiver and what firm or firms sourced the many makers that offered them. I hope your post re-energizes such discussions. Clamshell double rifles, drillings, and even shotguns are not in anyway ordinary so you were very lucky; having one chambered for the 9.3X74R makes it even better. Enjoy!

I look forward to hearing more about your find.

Regards,

Buchseman