lot of 3 antique Transposing Frames ("châssis alterneur") for stereo photography + 2 contact printing frames A negative taken with a two-lens stereo camera will have its two images transposed at the taking stage. To be viewed correctly, the image from the right-hand lens must be on the right side of the print or transparency. By using a transposing frame, every image can be printed in its correct position. Offered here a lot of 3 antique Transposing Frames for stereo photography 1 stereo 6x13cm format (234x128x12mm, 479g) 2 stereo 6x13cm format, engraved "Marque de Fabrique _ Astre _ Deposée" (208x76x18mm, 194g) 3 stereo 45x107mm format, engraved "châssis alterneur _ Verascope Richard _ Modèle Déposé" (188x63x15mm, 264g) (clear glass is useful for working with film instead of glass plates). also included: 4 French 6½x9cm contact printing frame, engraved "H. Mackenstein PARIS" (115x92x20mm, 151g) 5 French 6½x9cm contact printing frame, engraved "H. Mackenstein PARIS" (115x92x20mm, 107g) brass and glass, wood or bakelite, complete, fully functionally very clean, good condition shipping method: Post Office or GLS (depending on your country) registered, with track and trace on internet in case you buy 2 or more lots I will combine shipping and will refund you the overpaid postage