Designer/Inventor: E. Remington & Sons. Action Type: Circular action hammers. Caliber/Gauge: 10, 12, and 16 gauge. Serial Number Blocks: 0,000 – 105,000, 200,000 – 260,000, serial numbers were re-assigned to the 200,000 block circa 1900. Grades Offered: Grade 1 – Decarbonized steel barrels Grade 2 – Fine twist barrels side by side configuration, 12 gauge, matching serial numbers 215523, barrels 30 in., LOP 13-3/4 in., barrel rib engraved "REMINGTON ARMS CO. ILION, N.Y. U.S.A.", left barrel improved modified, right barrel improved cylinder, dual triggers, case coloring to receiver, barrel lugs, and metal under action release, double brass bead sights ...