SPECIFICATIONS
MovementAutomatic mechanical, Sellita SW200-1, 4 Hz (28,800 vph), 26 jewels, hacking and hand-winding, display back
CaliberSW200-1
Case size38.5 mmmm
Case materialStainless steel, satin finish
Case shapeRound
Thickness11 mmmm
Lug width20 mm, drilled lugsmm
CrystalFlat sapphire crystal with double anti-reflective coating, sapphire crystal exhibition caseback
Dial colorMatte black
ComplicationsHours, minutes, central seconds, date display at ~4:30 position
Sinn
556A RS
The Sinn 556A RS is a 38.5 mm stainless-steel three-hand sports watch with a Sellita SW200-1 automatic movement, 200 m water resistance, sapphire front and back, and a matte black Arabic-numeral dial with a red seconds hand. It is positioned as Sinn’s entry-level tool watch line.