a Lady asked me about a good place to appraise and sell an antique pistol in Baltimore metro area. I believe it is a Belgian pin revolver. I really know nothing about antique firearms and all the old guys I knew who did a lot of this are sadly gone.
First step would be to post as many GOOD clear photos as possible right here, including all markings (especially proof marks). Even the standarsd blurry photo from a bad angle is beter than nothing.
I don't think Belgian pinfires are worth much. She might do better swapping it for a $100 Walmart gift card at a "buy back."