Stefan, A factory letter is probably going to say the gun was shipped to M.W. Robinson, NYC. Robinson could have cased it for the buyer. If you send for a letter, let us know what it says. I notice the NY License says the gun is 45 caliber, which I assume is an error. If it's really a .45 cal., it has to be .45S&W Schofield caliber. and therefore a very rare special order gun. Most of these guns are either .44S&W Russian, or .44-40 WCF. The latter caliber having a slightly longer cylinder to to use the .44-40 WCF round. I have one of this model in caliber .44S&W Special, with no serial number, so odd calibers were made. S&W would make anything you wanted to pay for. Ed.