The 8 1/2 inch round barrel with six groove rifling in .54 caliber, the breech marked US/JA/P. Flat lock plate cut-out for the rounded nipple drum, the upper edge behind the cock slightly beveled; the plate marked twice U S. Flat cock. Iron furniture with brass trigger guard bow and lock plate. Walnut stock with no apparent inspector’s markings.
Condition: Very good. Grey metal showing scattered marks and areas of light pitting. Stock with scattered small marks, later coat of varnish and pinned repair above lock.
Note: Apparently either of composite construction or a transitional variant of the flat lock Waters.