Prinz 660 refracting telescope by Prinz Optics, Japan, c.1960s, 76.2mm (3-inch) aperture lens of 1,250 mm focal length with stout wooden case. Mass-produced telescope intended for amateur astronomers.
Prinz 660 refracting telescope by Prinz Optics, Japan, c.1960s, 76.2mm (3-inch) aperture lens of 1,250 mm focal length with stout wooden case. Mass-produced telescope intended for amateur astronomers.
