Welcome to the Forum ! New Model 3 Frontier 's in caliber .44-40 , serial numbers 4500 to 4599 were made from April 6, 1889 to April 11, 1889. You can order a factory historial letter thru the link above to see when & where the gun was shipped. I have found that very often this model in the .44-40 caliber did not ship for sometimes 1/2 doz.yrs, or so, after it was made and appeared to be slow seller, probably beause the public favored the more accurate .44 Russian calibers over the .44-40, which is a handful to get any accuracy in this model DA. Ed.