Thanks for the quick responses though they were not all I’d hoped for. The rear sight only goes to 1800 yards and has no C mark so that’s clearly from a rifle. And the barrel measures nearly 24 inches. I’ll get some more pictures tomorrow and post them. I fear the cartouche won’t show much, it’s so faint. But the receiver markings actually are clearer in photos than in person so maybe...
Yes it does include the saddle bar and ring. 

Thanks for noticing my feet. This is certainly not he first time they have appeared in a photo I‘ve posted to a forum. Guess I need longer arms.   

Stay tuned for more and thanks again.

Skirmisher