Dear George,

Thank you for contacting Mearto with your appraisal inquiry.
The presented object appears to be a double barrel shotgun with a percussion lock. The gun barrel is hallmarked with sadly not clear readable hallmarks. This gun was made in the second half of the 19th century.
This piece is in medium condition and the left hammer is damaged.
An estimation would be between 100 to 200 USD.
This estimation is based on actual recent past recorded auction sales of comparables. Retail "asking prices" can be higher and vary.

With kind regards,
Georg