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Sinn EZM 1

EZM 1 (Ref. 503) was a Mission Timer produced by Sinn from 1997 through 2004.


Sinn introduced the Einsatzzeitmesser (EZM) line of special-purpose watches in 1997 with this EZM 1 and the Sinn EZM 2. It is an unusual chronograph with left-side crown and pushers and no subdials. The chronograph minute and seconds counter are centrally-located hands, along with running hours and minutes. The date is in a small window at 3 30.

The case, Reference 503, measured 40 mm in diameter and was 16.5 mm thick. It housed the Lemania 5100 chronograph movement.




  • Black, indexes with white luminous material
  • Hours and minutes hand with white luminous material
  • Central chronograph minutes and seconds hands


  • Hours, minutes
  • Chronograph minutes, seconds


  • Leather strap


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sinn_ezm_1.txt · Last modified: 11.10.2021 16:34 (external edit)

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