====== Omega Speedmaster Reduced ======
{{wst>image_cr|Omega|Speedmaster Reduced}}

The **Speedmaster Reduced** (also called **Speedmaster Automatic**) is an [[automatic chronograph]] by [[Omega]].

===== History =====
Designed to be a less-expensive, smaller, automatic version of the Omega classic [[Omega Speedmaster Professional|Speedmaster Professional ("Moon Watch")]], the Speedmaster Reduced has gained fans thanks to the smaller size and different dial. In contrast to the original Speedmaster, it has an [[automatic]] movement with wider-spaced [[subdial]]s and [[Arabic]] [[numeral]]s on the dial. Because the movement is (traditionally) [[modular]], the Speedmaster Reduced is thicker than the original Speedmaster Professional, however, and sits higher on the wrist. The smaller case is [[waterproof]] to 3 atm.

Most Speedmaster Reduced models used modular movements ([[Omega 1140|Cal. 1140]], [[Omega 1143|1143]], and [[Omega 3220|3220]]), pairing an [[ETA]] base with a chronograph module by [[Dubois-Depraz]]. These have "uneven" pushers and crown and subdials at 3, 6, and 9 and have various reference numbers, notably 3510. However, the 39 mm Speedmaster Automatic, introduced in [[1991]], uses the integrated [[Valjoux 7750]]-based [[Omega 1155|Cal. 1155]] movement, giving it a distinctly different look with subdials at 12, 6, and 9. The Valjoux-powered Speedmaster Reduced (Ref. 3520) is also sometimes known as the Mk40 or Triple Date ("TDate") because it features a [[full calendar]].

Omega has variously referred to the 39 mm Speedmaster as "Reduced" and "Automatic" since the [[1988]] introduction. The same case has often had different names The original 175.0032 was sold as the "Speedmaster Reduced" with [[Omega 1140|Cal. 1140]] in 1988, "Speedmaster Automatic Racing" with [[Omega 1141|Cal. 1141]] in 1996, and simply "Speedmaster Automatic" with [[Omega 1143|Cal. 1143]] in 1998. Similarly, the Valjoux-powered 175.0043 was sold as a "Speedmaster Reduced" in 1991 and just "Speedmaster Automatic" two years later. And the model numbers have remained consistent even as calibre numbers have changed Ref. 3510 used [[Omega 1140|Cal. 1140]] in 1988, switched to [[Omega 1141|Cal. 1141]] in 1996, [[Omega 1143|Cal. 1143]] in 1997, and finally [[Omega 3220|Cal. 3220]] in 2003. Although all four calibres are technically related and very similar, this has caused much confusion among modern collectors.

Note that one of the rarest and most sought-after Speedmaster models, [[Omega Speedmaster Automatic|case number 376.0822]] from [[1987]], used the same 3510 reference number as common Speedmaster Reduced watches, even though it was a full-sized Speedmaster with a [[Lemania 5100]] movement.

===== Models =====
  * [[1988]] 175.0032 - [[Omega 1140|Cal. 1140]], "Speedmaster Automatic Reduced" 39 mm case, leather strap
    * [[1988]] 175.0033 - [[Omega 1140|Cal. 1140]], "Speedmaster Automatic Reduced" 39 mm case, leather strap
    * [[1988]] 375.0032 - [[Omega 1140|Cal. 1140]], "Speedmaster Automatic Reduced" 39 mm case, bracelet
      * [[1989]] 375.0033 - [[Omega 1140|Cal. 1140]], "Speedmaster Automatic Reduced" 39 mm case, two-tone bracelet
    * [[1988]] 475.0032 - [[Omega 1140|Cal. 1140]], "Speedmaster Automatic Reduced" 39 mm case, gold and diamonds, gold bracelet
  * [[1991]] 175.0043 - [[Omega 1155|Cal. 1155]], "Speedmaster Automatic Reduced Date" 39 mm case, leather strap
    * [[1991]] 375.0043 - [[Omega 1155|Cal. 1155]], "Speedmaster Automatic Reduced Date" 39 mm case, bracelet
    * [[1992]] 175.0063 - [[Omega 1155|Cal. 1155]], "Speedmaster Automatic Reduced Date" 39 mm case, leather strap
      * [[1992]] 375.0063 - [[Omega 1155|Cal. 1155]], "Speedmaster Automatic Reduced Date" 39 mm case, bracelet
  * [[1999]] 175.0039 - [[Omega 1143|Cal. 1143]], "Speedmaster Automatic Reduced AC Milan" 39 mm case, leather strap
  * [[2000]] 275.0032 - [[Omega 3220|Cal. 3220]], "Speedmaster Automatic Reduced Ladies"
    * [[2003]] 175.0041 - [[Omega 3220|Cal. 3220A]], "Speedmaster Automatic Reduced Ladies Japan"
    * [[2003]] 275.0032 - [[Omega 3220|Cal. 3220A1]], "Speedmaster Automatic Chronometer Reduced Ladies"
  * [[2000]] 175.0040 - [[Omega 3220|Cal. 3220]], "Speedmaster Automatic Racing"
  * [[2001]] 175.0032 - [[Omega 3220|Cal. 3220]], "Speedmaster Automatic Reduced" (decorated calibre)
    * [[2003]] 175.0032 - [[Omega 3220|Cal. 3220A]], "Speedmaster Automatic Reduced Japan"


<WRAP ud ud_mod>

**Reference:**
  * 3510.50.00

**Movement:**
  * [[Self-winding]] [[chronograph]] movement [[Omega 3220]] (basis [[ETA 2892-A2]] with chrono module [[Dubois Dépraz]] 2020), 28,800 A/h
  * [[Rhodinated]] movement
  * Power reserve 40 h

**Case:**
  * [[Stainless steel]], polished/[[satin-finished]]
  * D 39 mm (instead of official 35.5 mm), H 12 mm 
  * Armoured [[plexiglass]]
  * [[Waterproof]] to 30 m

**Dial:**
  * Black, Arabic numerals and indexes
  * Hands and indexes with [[luminous]] material [[Tritium]]

**Functions:**
  * Hours, minutes, [[small seconds]]
  * Chrono-seconds, 30-minutes and 12-hours counters

**Bracelet:**
  * [[Stainless steel]] bracelet with [[folding clasp]]

**Garantie**
  * 2 years
</WRAP>
===== Literature =====
  *Omega-Uhren. Kaleidoskop einer bekannten Swiss Marke; Author Anton Kreuzer; ISBN 3853783546
  *Omega-Modelle; Author Anton Kreuzer; ISBN 3853784186
  *Omega Sportuhren; ISBN 3871880817
  *[[Das ZEITGEFÜHL-Uhrenbuch]]; Author [[Gerd-Lothar Reschke]]; ISBN 3-938607-61-0


{{tag>Watch_models Chronographs Omega_models}}