Dear Gerald,

Thank you for contacting Mearto with your appraisal inquiry. My sincere apologies for the delay with the appraisal.

The presented object appears to be a U.S. 58 Model 1863 (Model II) Civil War period percussion lock rifle with a bayonet. The lockplate is stamped with the US eagle, the manufacturer G.&Y. Windsor, VT, and 1863. The rifle has an overall length of 55.5 inches.
Comparable objects were recently offered and sold on the international auction market.
This piece is in medium condition and no severe damage is visible in the images provided.
A fair market estimation would be between 600 to 1.200 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,
George