Opera binoculars optical made in USSR circa 1960s.
Opera binoculars have Galilean optical system with a central internal focusing. Focusing is performed by turning the handwheel. Binoculars with increasing 2.5-fold provides sharp images of objects removed from the observer at a distance of 1 meter to infinity.
In perfect working condition.
Measures: 4 x 2 x 1.4 inches (10 x 5 x 3.5 cm)