It sports what is known as a "doll's head" third-fastener
Ruffed Grouse on the right side
The gun was made in Birmingham, England as #2 of a pair around 1910 for an outlet in New York. It has 2 1/2" Chambers proofed for 1 1/8oz. loads. It has 30" barrels and weighs 6lbs. 8oz.
A blackcock is engraved on the underside and a Setter on the trigger-guard
The forend is especially impressive, as it is inlaid with ebony
The selector for the mechanical single-trigger