Japanese-made eyepiece for older (pre-Geoma) Vixen spotting scopes i. Specifications: magnification, 20X with 50mm Vixen scope, 25X with 60mm Vixen scope. Also fits many older Vixen-made Celestron and Bushnell Spacemaster & Spacemaster II scopes, as well as older Kowa scopes (eg, TS-1, TS-2, others) with same female M28 x 0.75 thread (see example in photos).
Original front and rear caps. Thanks for visiting Nippon Rare Optics!