A 100 Bore Irish Percussion Box Lock Turn Over Pistol, by M & I Pattison of Dublin. With turn off barrels each engraved with lines and a band of ornament at each muzzle, and numbered respectively 1 and 2, scroll engraved breeches, signed scroll engraved box lock action and hammer, folding trigger, flattened chequered walnut butt, beautifully engraved silver butt cap, vacant silver escutcheon. 

Pattison

Mark & John, 17 Crampton Court, Dublin. Under Royal Government contract made flintlock holster pistols and flintlock carbines. 

Richard J. Garrett (2008) Irish Gunmakers, Printed in Hong Kong. 

Dimensions:

Bore: 100 Bore

Barrel Length: 2.5 Inches (6.35 cm)

Overall Length: 6.5 Inches (16.51 cm)