Remington Model 1900s are a simplified, cheaper, version of the Model 1894, built on the same patents -- No. 528,507 and No. 528,508 both granted Oct. 30, 1894. The Model 1900s were all K-Grades, with E added to the designation if the gun had ejectors and D if it had Damascus barrels -- K-, KE-, KD-, or KED-Grades. The K- and KE-Grades had Remington Steel barrels. The Model 1900s had a snap-on/off forearm and their serial numbers were in the 300,000 range, often preceded with a stock letter Q.
Actually Remington Arms Company called them all "Remington Hammerless Double Barrel Shotguns" in the catalogues, and the only differentiation was the grade. The only place the terms "Model 1894" and "Model 1900" are found is in the parts lists.
