CASE: Two-body, polished and brushed, with curved lugs, screwed-down case back.DIAL: Black with luminous baton indexes and Arabic numerals, outer minutes/seconds divisions, aperture for the date. Luminous baton hands.MOVEMENT: Cal. C11KAS 1, brushed decoration, 17 jewels, straight line lever escapement, monometallic balance, shockabsorber, self-compensating flat balance spring. Inside case back engraved “Super-Compressor” with patent numbers and the bust of a diver. Dial, case and movement signed, in good conditionDIAM: 36.5 mm. THICKNESS: 13.5 mm.NOTE: It is very rare to find a Wittnauer Super-Compressor with the original crystal featuring the inverted Cyclops date magnifier.