I grabbed my paperback on Sharps by Coates & McAulay, and came up with pretty good results (not great, just pretty good). This comes in the category of "close, but no seegar". The closest numbers of that model come in a grouping for Company L of the 16th Pennsylvania Cavalry, as 69001, 69031, 69052, 69055, 69067 an 69095 are listed. The authors indicate these would have been the initial carbines delivered to the regiment in early 1863, along with Colt army revolvers.