153. M6 (Electronic) Prototypes + Design Models

These four cameras (ex Leitz Museum) show the evolution of M6 from the wooden design model to a working prototype camera: (1) wooden demonstration model with metal lens mount, frame selector and apparently very long film winding mechanism, covered with leather and marked 'MADE BY LEITZ PORTUGAL' on the back, the top plate is unmarked, but with the typical Leica Museum sticker numbered '1405'. (2) The second model already has metal applications, the base plate is removed by a centrally placed screw, only the shutter speed dial, the rewind crank and the frame selector lever can be moved, the top plate shows the red Leitz logo and the lettering 'LEICA M6 ELECTRONIC'. (3) The third model is probably the most planned study, the base plate has a battery chamber and a motor connection with a cut-away model of a Motor Drive R4, the top plate is bevelled on the side of the rewind crank, the shutter speed dial, engraved with 100, B, X and 1-1/1000 sec. above the ISO setting dial and exposure control, on the back of the top plate is a switch similar to the Leica R3, the back is fitted with a DIN/ASA indicator, top plate engraved 'LEICA M6'. With unmarked dummy lens. (4) The last camera is already a fully functional prototype, top plate engraved 'ERNST LEITZ WETZLAR GMBH', on front 'LEICA M6', on base plate the Leica Museum sticker number '2308', shutter speed dial and film indicator show clear differences to the later production models, the cameras leather covering is marked 'MADE IN GERMANY', serial number 1621532 (approx.1983) which is assigned to M4-P. The first official production camera was no.1657251. The Leica M6 was the first Leica with TTL exposure metering in a classic M housing. All the electronics finally found space in the area of the previously built-in self-timer.

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