Ahoi Atlantic date

Back: sapphire crystal glass back. Caliber: DUW 5101. Winding Mechanism: automatic winding. Case Size: 40.3 mm. Case Height: 10.64 mm. Power Reserve: 42h. Water-Resistance: 20 atm. Strap: textile strap. Strap Color: blue black. Lug Width: 20 mm. Strap Length: M - 118/75. Clasp: NOMOS winged clasp. stainless steel. square. Clasp Width: 20 mm. Dial Color: atlantic blue. Numerals: arabic. Special Features: domed sapphire crystal glass with anti-reflective coating. back fixed with six screws. screw-down crown. crown guard