A Flintlock Box-Lock Pocket Pistol by Johnson & Collins. With round turn-off barrel fitted below with a sprung bayonet, the trigger guard releasing the bayonet, border engraved box-lock action, decorated with stands of arms and signed on  the left side, ‘JOHNSON & COLLINS’ sliding safety catch, slab sided walnut butt, stamped with Birmingham proofs. 

Johnson & Collins [about 1810]

Made flintlock pocket pistols and steel barrel flintlock blunderbusses. Shop at Birmingham. 

A. Merwyn Carey (1954) English, Irish and Scottish Firearms Makers, Acro Publishing Company, New York. 

Dimensions:

Bore: 54 Bore

Barrel Length: 2.5 Inches (6.35 cm)

Overall Length: 8 Inches (20.32 cm)