Dear Eric,

Thank you for your help and patience.

The presented object appears to be a set of modern period percussion lock dueling pistols coming in a wooden case. The barrel and the lock are not stamped with proof marks or manufacturer hallmarks. The details of the surface and the traces of modern tools are a hint that this set was made in the middle or second half of the 20th century.
This piece is in good condition and there is no serious damage visible in the images provided.
A fair market estimation would be between 40 to 80 USD.
This estimate is based on actual recent past recorded auction sales of comparable items. Retail "asking prices" can be higher and may vary.

With kind regards,
Georg