====== Heuer Calculator ======

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== Picture links ==
  * [[https://www.google.de/search?q=Heuer+Calculator&source=lnms&tbm=isch&sa=X|Google/Images: Heuer Calculator]]
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**Calculator** is a wristwatch by [[Heuer]].

Sports [[chronograph]] by Heuer (now [[TAG Heuer]]), [[1971]] launched, with slide rule [[bezel]] and a for its time unusually large housing of 45.5 mm diameter. The watch was equipped with the [[automatic]] chronograph calibre [[Chronomatic]] with [[microrotor]], first produced in [[1969]]. Its typical, construction mark is the left sided crown, located at 9 h.


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**Reference:**
  * 110.633, Calibre 12, dark blue dial
  * 150.633, Calibre 15, dark blue dial
  * 740.633, dark blue dial (1974)
  * 11633 MHT [[Tachymeter]] (fixed), slide rule, black dial (1977)

**Movement:**
  * [[Self-winding]] [[chronograph]] movement Calibre [[Heuer 12]] (later [[Heuer 15]]), 21,600 A/h
  * [[Incabloc]] [[shock protection]]
  * 17 [[jewels]]
  * [[Power reserve]] 45 h

**Case:**
  * [[Stainless steel]]
  * Ø 45.5 mm, H 15.5 mm
  * [[Mineral glass]]
  * [[Crown]] at 9 h
  * Screw-in back
  * [[Waterproof]] to 10 atm

**Dial:**
  * Dark blue (//11633 MHT // black)
  * Two [[totaliser]]s
  * Indices and hands with [[luminous material]] [[tritium]]

**Functions:**
  * Hours, minutes
  * [[Small seconds]] at 9 h (Calibre 15 at 10 h)
  * Date bei 6 h
  * Chrono function with 2 counters central stop seconds and 30-minutes counter at 3 h
  * Slide rule

**Bracelet:**
  * Cowskin leather strap with [[tang-type buckle]] or [[stainless steel]] bracelet

**Prize:**
  * According to condition and model approx. 1.200-2.500 €
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{{tag>Watch_models Chronographs TAG_Heuer_models}}