Heuer 12

This chronograph movement was createdin a secretpartnershipbetweenBreitling,Heuer-Leonidas, Hamilton/Burenand DuboisDéprazin order to developthe firstautomaticchronograph.Caliber11Chronomaticwas presentedin March 1969shortly after theZenith/Movadopresentedthe firstautomatic windchronograph (ELPrimero) in Januarythe same year.The chronographmoduleDuboisDépraz8510hasalso been used byValjoux,Cal:7740.

Data Heuer cal: 12

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  17 jewels, automatic wind (microrotor), chronograph, 60 s, 30 min, 12 h, date.
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  Size: 13,75''' 31,00 mm.
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  H: = 7,70 mm.
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  N: = 21600.
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  Power reserve: 42 h.

Versions: Heuer

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  11: N: = 19800.
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  12: N: = 21600.
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  14: as cal: 12 with 24h GMT.
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  15: as cal: 12, sub second instead of 12 h counter.