A 12-BORE ROTARY-UNDERLEVER HAMMERGUN, serial no. 2459,
30in. black powder only bold damascus barrels, rib engraved '1' and 'THOMAS JACKSON. 89. WIGMORE STREET. LONDON. W.', some pitting, 2 1/2in. chambers, bored approx. true cyl. in both, carved percussion fences, non-rebounding back-action locks with dolphin hammers (one repaired), bold and fine acanthus scroll engraving, 14 5/8in. figured stock including steel buttplate, weight 6lb. 12oz.