Seagull ST1908 Chronograph, Column Wheel Movement. Sapphire Crystal Front and Back 40mm Case Size / (Without Crown) 22mm lug Width / Strap Width 47mm lug to lug / Height of Watch. 12mm thickness Swan Neck Regulator.. Swan neck is a part used to regulate the pace by adjusting the length of spring the shorter length of spring, the faster harmonic motion of balance wheel, thus speed up the pace; the longer length of spring makes balance wheel's motion slower, thus slow down the pace.The item "Seagull Sugess ST1908 Chronograph Watch Genuine Moon-phase Venus 175 1963 ST19" is in sale since Friday, December 6, 2019. This item is in the category "Jewellery & Watches\Watches, Parts & Accessories\Watches\Wristwatches". The seller is "beyond_time" and is located in Officer, VIC. This item can be shipped worldwide.