The Zodiac 75 watch movement is a Swiss-made automatic caliber introduced around the early 1960s, known for its reliability and technical sophistication in vintage wristwatches. It is part of the Zodiac lineup of automatic movements, notable for incorporating a 24-hour hand complication, which was relatively uncommon and useful for GMT or second time zone tracking.
Key features of the Zodiac 75 movement include:
Automatic mechanism based on the manual wind AS 1687/1688 caliber with adaptations developed by prominent Swiss manufacturers like Doxa, Eberhard, and Favre-Leuba.
Sweep second hand providing smooth second tracking.
24-hour complication that allows the wearer to track a second time zone, often accompanied by a bi-color 24-hour bezel to indicate day and night.
Quickset date feature operated by pushing the crown repeatedly, enhancing user convenience in calendar adjustment.
The movement measures 11.5 lignes (about 25.6mm diameter) and has a height of around 5.1mm, fitting well into vintage watch cases from the era.
Used in models like the Zodiac Aerospace GMT, which combined practical travel features with good legibility, luminescent indices, and a robust automatic caliber.
The Zodiac 75 and its variant 75B are highly regarded among collectors for their robustness and unique 24-hour complication, though parts can be difficult to find due to the movement’s rarity today. This movement represents Zodiac’s commitment to innovative complications in affordable, durable Swiss watches aimed at travelers and professionals in the mid-20th century.
Overall, the Zodiac 75 is a valuable mechanical movement in horological history, blending Swiss precision with practical complications for GMT functionality, and remains sought-after for vintage watch enthusiasts and collectors.
Bullet points summary:
Swiss-made automatic movement with 24-hour GMT complication.
Based on AS 1687/1688 manual caliber with automatic module by Doxa and others.
Features sweep seconds, quickset date by crown push, and 24-hour hand.
Dimensions: 25.6mm diameter, 5.1mm height.
Found in 1960s Zodiac Aerospace GMT watches.
Valued for rarity, robustness, and travel-friendly complications.
Replacement parts and complete movements are rare and sought after.
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Stem, Crown, Hands & Spares might be available for this movement.
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