years 1930/1940 Folding binoculars"" RAPID OPTIC"" . Has a (folding) dimensions of 8.5 x 3.5 x 2.5 cm and when deployed, its overall dimensions are 9.5 x 3.5 x 10.5 cm. It has a compass on one side and a mirror on the other. It can also be used as a binocular magnifier (single and double), mirror signal I mirror, telescope and stereoscope, as shown in the instructions that accompany the instrument. It is housed in a cardboard box 9 x 3 x 3 cm. Complete with original box and instructions (handwritten on top) Built in a thermoplastic of the time (Bakelite, celluloid, etc ...) amber In very good condition, with the mirror slightly chopped (see detailed photo) Focus can be adjusted by means of a wheel (see detailed photo) In the compass (see photo detail) is drawn an arrow with approximate magnetic declination of Paris at that time. This allows us to date the article. (It's also helpful to know that these items were sold on an outpatient basis in English, French and German throughout Europe Postwar, calling them exaggerated, as the optical panacea.) This arrow was drawn to facilitate orientation. Vintage illustration is not included in the lot but serves to see how the"" macro magnification"" is emplaba to inspect any eye or similar accident.
