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

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

and one eighth of it is gold

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

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