Remington over/under derringers 1911r1 series foreign contract rolling block military rifles no. 1 rolling block sporting rifle remington-hepburn rifles remington-keene magazine rifle remington-lee rifles remington's nylon series.22 rifles model 597 series model 40x series model 700 series modern muzzleloaders model 870 series model 1100. According to John and Roy's book, this was introduced in 1890 and discontinued in 1900, when it was replaced by the lever takedown version. They state that this version's serial numbers went up to about 144,000, but also that there is some overlap in the serial numbers with the second version. So, it would appear your estimate is very close. Ghost - Remington made over 1,000,000 military Rolling Block rifles in many different calibers, foreign and domestic with different configurations specific to each contract, some with a low production number that are very valuable, ie the Vatican contract or the NY National Guard contract rifles.
It nevers ceases to frustrate me when you look at or purchase a No.1 Sporter with matching serial numbers and it it isn't even possible to determine the year of manufacture. Occasionally one gets a little information as to a manufacturing year. I have a 44-77 No. 1 Sporter with a silver plaque.No way to determine who the people were mentioned on that plaque but it is dated November 1879. The serial number is in the low 3,000 range. I think it is safe to assume that the rifle was made sometime in 1879 or no earlier then 1878. Not much info, but better then nothing. Now I have another rifle without a plaque with a serial number in the 1400's. I would assume that this rifle was most certainly made before 1879
![Rifle Rifle](/uploads/1/2/6/4/126466509/633197082.jpg)
How much earlier who knows. It would be nice to know Remington's rate of prodiction on No1. Sporters if it was in order and if it ramped up during the Buffalo Hunting years.