Sinn Watch 434 St B Ladies Leather Black 434.012 Leather Black. The stylish ladies watch with [Q] Technology and blue dial. The extraordinary character, resulting from the combination of timeless aesthetics and the utmost in precision, of our 434 St B model is waiting to be explored. The blue dial is an optical feature which we have finished with an additional sunburst decoration. This dial is set in an elegant stainless-steel case with crystal made of sapphire crystal glass. The appliqués, meticulously attached by hand, are subtle in their elegance in showing the hours and give the impression of a traditional ladies watch. And this watch fulfils strict requirements in terms of technology: it is resistant to low pressure, waterproof and can withstand pressures of up to 10 bar. It still features a high-precision, temperature-stabilised quartz movement. Additionally, we have minimised the electromagnetic radiation of the movement, as confirmed by the [Q] symbol on the dial.