45 degree prism finder 

Prism finder allows viewing image with left and right side not reversed. Finder swivels 360 degrees to facilitate viewing in difficult mounting situations, as when camera is on a tripod or microscope. Ideal for action photography.

45 degree Prism Finder Version 1
Rotates 360 degrees for easy access from every angle. 2,5x magnification, lens adapter for eye correction lenses.
In production from 1968-1995
Order #: 208 810

45 degree Prism Finder Version 2 Diamond Grid
Rotates 360 degrees for easy access from every angle. 2,5x magnification, lens adapter for eye correction lenses.
In production from 1986-1995
Order #: 208 910
Prism mounted on camera.
Prism rotated 90 degrees.
Prism comes with leather protection case. Shown here a rare version like a zippered soft case. Made in the late 1990s.
Version for SL66 camera with matching leatherette surface and the common hard leather case.
Under side of prism finder.