Two circle goniometer modified by Terpstra

Unsigned (possibly Fritz Rheinheimer, Stoe & Co.)
Two circle reflecting goniometer (lacquered and partly nickel plated brass) with graduated circles and vernier read-out, telescope and different collimator signals on a revolving disk, build in light source, adjusting wheels, and goniometer head. Collimator and telescope are in a plane perpendicular to the horizontal circle. Height 38 cm.
Unsigned, ca. 1960.
Goniometers of this type have been constructed by Fritz Rheinheimer (Stoe & Co.)

private collection