From the link below<img src="http://www.rememuseum.org.uk/arms/pistols/armfppp/arm233.jpg" alt="" />
A solid frame, fixed cylinder, rod ejector revolver, having a single and double action and a folding trigger. A loading gate is located on the right hand side of the revolver and ejection is carried out by means of a manually operated ejector rod. The cylinder has six chambers. This type of revolver is a Belgian imitation of the Webley design, the quality of which is fair or poor. These pistols appear in numerous designs, with exposed or enclosed hammers, with or without trigger guards, with and without manual safeties, some with folding triggers, and in a tremendous range of lengths, weights, grip styles, etc. The range of calibres are tremendous also, in pin-fire type alone it is produced in 5 mm, 7 mm, 9 mm, 12 mm and 15 mm forms. These pistols were produced around the mid 19th Century.
Also with hex barrel:
<img src="http://www.rememuseum.org.uk/arms/pistols/armfppp/arm235.jpg" alt="" />
And another pin-fire listed as an 1860 civil war piece