====== Sinn 203 ======
{{wst>image_cr|Sinn|203 TiAr}}

The **Ref. 203** is a diver's [[chronograph]] by [[Sinn]] with [[self-winding]] movement produced until [[2012]].

===== Overview =====
The Sinn Ref. 203 series are [[dive watch]]es with [[automatic chronograph]] movements. They are water and pressure resistant to 30 bar (300 m) and also shock- and magnetic-resistant to [[DIN 8306]] specifications.

The Sinn 203 Ti Ar was the first model to feature Sinn's Ar-Dehumidifying technology on launch in [[1995]]. The 203 ARKTIS was used in the Arctic Sea in [[1999]], proving its temperature and vibration hardiness.

===== References =====
  * 203 ARKTIS (1999-2012) - Temperature resistant from -45 to +80 C, blue dial
  * 203 Jubiläum ("Anniversary") (2006-2009) - Anthracite dial and white subdials, limited edition of 450 pieces
  * 203 St (-2012) - Black dial
  * 203 St 18 KT (-2005)
  * 203 Ti Ar (-2006) - Titanium, Ar-Dehumidifying
  * 203 Ti Ar 18 KT (-2005)


<WRAP ud ud_mod>

**Movement:**
  * [[Valjoux 7750]]
  * [[Automatic]]

**Case:**
  * [[Stainless steel]]
  * Ø 41 mm, thickness 16 mm
  * [[Sapphire crystal]]
  * Diving [[bezel]]
  * Dehumidifying technology by filling the case with the noble gas argon and patented dry capsule
  * [[Waterproof]] to 300 m
  * [[Shockproof]] and [[anti-magnetic]]
  * [[Screw-in crown]] and pushers

**Dial:**
  * Black, anthracite, or blue
  * Hands and indexes with highest luminosity

**Bracelet:**
  * Leather strap or bracelet

**Production:**
  * Production Until [[2012]]
  * Successor [[Sinn 206]]
</WRAP>

{{tag>Watch_models Chronographs Sinn_Diving_Watch_models}}