====== Sinn 901 ======

{{wst>image_cr|Sinn|901}}

**Ref. 901** is a square [[chronograph]] watch from [[Sinn]] produced from [[2012]] through [[2018]].

===== Overview =====
Sinn refers to this as their "Technical-Sporty Chronograph" model, and it features a square "television" case (-> [[TV Case]]) and chronograph [[register]]s, angular markers, and modern styling. A limited edition of 150 pieces, Ref. 901 was introduced in [[2012]] but it recalled the similar [[Audi Design]] chronograph, Ref. 9901.010, produced in [[2004]]. The square case is also related to the Ref. 9901.020 Audi Design watch as well as the limited-edition [[Sinn 902|Sinn Ref. 902]].

The Ref. 901 chronograph uses a [[Valjoux 7750]] movement, with 30-minute and 12-hour chronograph registers at 12:00 and 6:00, respectively, and [[small seconds]] at 9:00. A [[date window]] is located at 3 :00. The trapezoid hands are different from the Audi Design model, as are the "M"-shaped markers at the corners. Large rectangular pushers frame the modern crown, while a novel strap adjustment lever is located on the opposite side.

<WRAP ud ud_mod>
**Movement:**
  * Mechanical [[automatic chronograph]] movement [[Valjoux 7750]], 28,800 A/h
  * 25 [[jewels]]

**Case:**
  *  [[Stainless steel]], with TEGIMENT technology
  * 38.4 mm × 36.8 mm, H 16.5 mm
  * [[Sapphire crystal]] with [[anti-reflective coating]] on both sides
  * Screw-down case back
  * [[Waterproof]] to 10 bar

**Dial:**
  * Electroplated black
  * Indexes coated with luminous paint
  * Hour and minute hands coated with luminous paint
  * Chronograph display coated with day-light luminous paint

**Functions:**
  * Hours, minutes, [[small seconds]]
  * Date window at 3:00
  * [[Chronograph]] 12 hours counter, 30 minutes counter, 60 seconds counter

**Bracelet: **
  * Leather strap
  * Fine adjustment of the lugs, allowing the strap length to be lengthened or shortened. The mechanism inside the case allows the strap to be adjusted within a range of 3 x 0.8 mm per lug.

**Production: **
  * Produced [[2012]]–[[2018]]

**Limited Edition:**
  * 150 pieces
</WRAP>

{{tag>Watch_models Automatic Chronographs Sinn_models Sinn_Instrument_Chronograph_models}}