Telescope accessory, Erecting Prism, made in Japan.
Imported from Japan in 1960. In perfect condition. Make unknown.
Still in original box.
Dimensions : body measures 3.5 cm tall, diameter of the body measures 6.4 cm,
tubes on each side measure 2.5 cm long. Exterior diameter of the tube measures 2.4 cm.
Filed under: Eyepieces & Accessories