An ORIGINAL Williams 5d-JEMS peep sight from the late 1940s. This peep sight ffits number of guns including the Enfield Models 1914, 1917, the Japanese Type 38 and 99, the Mauser Model 98 and 99, and also Daisy 99 and 299 rifles. The left-handed Remington Model 700 is also a riflethat this peep sight fits.