Stereo Viewer (various)

Small collection of 5 different viewers: (1) Zeiss Aerotopo table viewer with 2x & 4x oculars in wooden box (length: 32cm), (2) Carl Zeiss Jena table viewer with adjustable eye-pieces and plate holder for 6x13 slides, (3) Stumpf Stereobinocel for 45x107mm, adjustable, with copy of instructions in wooden box, (4) Colde stereo viewer for 45x107mm, adjustable with two colour slides in maker's box, (5) Underwood & Underwood wooden handheld stereo viewer for 6x13 stereo cards (5)