.49 Cal., Double Barrel percussion pistol

[Double J]

I'm still trying to find out what I can on this pistol. It is .49 caliber.side by side. Half- stock on the order of early 1800's. Small hammers. Case colored back locks. Iron furniture. Thin barrels like shotgun are smoothbore. The only markings read "Liege W. Belgium". The gun came from an estate auction in St. Louis Mo. many years ago. Pretty maple? stock. Really nice shape. Would it have any collector value?

 

[Black Powder Jack]

I have a matched pair of these pistols in a presentation case with accessories (see attachment) and was told they were manufactured late
1800s. I was offered $4500 several years ago, but chose not to sell at that time.
BPJ