Several other "NY" marked Clark muskets are known with different numbers and slight variances in patterns (India vs Short Land). Several have come out of the Hampden House collection in Buckinghamshire, England. They are believed to have been issued to English volunteer units (possibly the Northamptonshire Yeomanry) around 1790. There are several Clarks active in the late 18th century gun trade, but it is believed that these were manufactured by Wattel Clark of 133 High Holborn, London. Wattel Clark began his apprenticeship in 1770 and was active until around 1815. It features a standard bayonet stud that doubles as a front sight, "LONDON" marked on top of the barrel, ordnance proofs flanking an "SI" stamp on the upper left of the breech, "CLARK" marked lock, "146" marked on the brass side plate (the fit of the side plate is slightly off), "48" marked in the wood ahead of the buttplate tang and "N=Y/37" marked on top of the brass buttplate tang. A small "X" is deeply carved into the left stock flat.