montre sinn 857 s utc bracelet metal endlinksAP The model 556 A RS

The model 556 A RS has a special feature: The red second hand is in a harmonious contrast to the black of the dial and the white of the numbers and indices

nylon or rubber

the alloy achieves a higher degree of inertness in the face of environmental influences than ordinary bronze (CuSn8) because it has gold as a component

a special hardening of the submarine steel that prevents the coating from flaking off due to different material hardnesses

montre sinn 857 s utc bracelet metal endlinksAP The model 556 A RSCase made of Stainless steel Case made with Black Hard Coating on a TEGIMENT Technology basis Ar Dehumidifying Technology enhances functional reliability and freedom from fogging Magnetic Field Protection up to 100mT (=80,000 A m) Nickel free case back without TEGIMENT Technology Second time zone on a 24 hour basis Captive pilot's bezel with minute ratcheting Sapphire crystal glass Water resistant and pressure resistant to 20 bar Low pressure