I have seen a couple of Model 1894s that had Remington Repair codes on the barrel flats, but those date codes didn't start until 1921. So, any gun done by Remington Arms-Union Metallic Cartridge Co. (1911-1916) or The Remington Arms Union Metallic Cartridge Company, Incorporated (1916-1920) wouldn't have them.

All speculation. I know I have seen a couple of other Remington Hammerless Doubles with choke designations rather than pellet counts, but can't lay my hands on a picture at the moment.