Hi, I am new to the forum so please pardon my question if it's not one that can been answered. I am looking at purchasing a Colt Army Model 1860 with serial number 50895. I note from Colt's site that it has a manufacture date of 1862 and I know that I can order a history letter that will show some more detailed information but only general in the sense of what quartermaster it was shipped to. I was hoping someone may have the Springfield Research Service books that could give me a better idea of what unit the weapon may have been issued to. I understand after the first issue it gets muddy from there but I was hoping to get some history before deciding whether to make the investment or not. Sorry, no photos at the moment as I do not own the pistol. Thanks for any help.