Observation binoculars, Theatre binoculars - 1950-1970 - Japan - Bluebird

beautifully preserved pair of vintage "Bluebird" theater binoculars (opera glasses), complete with their original stitched leather protective case.Characterized by a highly compact, pocket-sized design, these glasses feature a 2.5x magnification power, making them perfectly suited for indoor stage performances like theater, opera, and ballet. They boast a classic mid-century aesthetic with a glossy black finish, beautifully complemented by textured vulcanite barrels that provide a secure, comfortable grip.A smooth, central ribbed adjustment wheel handles simultaneous focusing for both lenses. The model details—"BLUEBIRD" and "2.5X"—are cleanly engraved on the central bridge plates.