Turnit finder (339/50) from 1953.
Fit on accessory shoe of the interchangeable lens cameras.
Makes view easier with 35 and 100 mm lenses due to a larger image without parallax (distance adjust by cursor).
Rotating 180° this attachment allows to easily change focals.
First model with bakelite body.
Front of the Turnit, base partially turned.
Back of the Turnit.