Alpina Genve is a Swiss manufacturer of accessible luxury watches and is an independent company based in Geneva, Switzerland. Founded in 1883, Alpina continues to develop highly distinctive and attractive collections with a real sporting pedigree. Case: Brushed and polished stainless steel Caseback: Stainless steel, screw-down Bezel: Black stainless steel, unidirectional rotating Dial: Black Hands: Silvertone and orange, luminescent Markers: Silvertone luminescent indices and dots Calendar: Date display window at the 3 o'clock position Bracelet: Brushed and polished stainless steel Clasp: Push-button deployment Crystal: Sapphire Crown: Screw-down Movement: Swiss automatic Power reserve: 45 hours Water resistance: 30 ATM/300 meters/1000 feet Case measurements: 38 mm in diameter x 10 mm thick Bracelet measurements: 19 mm wide x 8 inches long Box measurements: 7 inches wide x 8 inches long x 4 inches high Model: AL-240LBO3V6B All measurements are approximate and may vary slightly from the listed dimensions. Women's watch bands can be sized to fit 6.5-inch to 7.5-inch wrists. Extra links are available through the manufacturer. (We do not provide this service). A screw-down crown (knob) creates a water-resistant seal. To unscrew the crown, turn counter-clockwise and pull/push into position to set time, date, and other functions. To close the crown, press it against the case and turn clockwise. Color: Black. Gender: Female. Age Group: Adult.