The Sinn "903," rooted in Breitling's Navitimer, is a series featuring functions for navigators and pilots.The "Ref.903.st.gl" is a reference from around the 1990s. It is a timepiece combining a 41mm stainless steel case with a black dial featuring a silver inner dial, powered by the Lemania chronograph caliber "1873". Overhauled by our shop. 【Condition】 The strap shows signs of wear. There are a few minor scratches on the glass surface. The hour hand has slight cracking in the luminous coating. As a vintage watch, it also exhibits overall aging and wear marks, but it is in good condition for a vintage piece. 【Accessories】 Our store's original box 【Size】 Men's size case approx.: 41mm 【Material】 Case: Stainless Steel Band: Genuine Calf Leather / Genuine Stainless Steel Buckle Crystal: Mineral Crystal