OMEGA has continually made significant contributions to the art of watch making since its founding in 1848. While OMEGA has distinguished itself in a number of different professional areas, the brand has always remained true to: innovative watchmaker. Case: Brushed stainless steel, with 18k yellow gold accents Case back: Stainless steel, screw-in Bezel: Brushed and polished 18k yellow gold, with Roman numerals engraved Dial: Silver Hands: Yellow goldtone, luminescent Markers: Yellow goldtone luminescent indices Calendar: Date display window at the 3 o'clock position Bracelet: Brushed stainless steel and 18k yellow gold Clasp: Push-button deployment Crystal: Sapphire Crown: Push/pull Movement: Swiss quartz Water resistance: 10 ATM/100 meters/330 feet Case measurements: 35 mm in diameter x 11 mm thick Bracelet measurements: 22 mm wide x 7 inches long Box measurements: 6.5 inches wide x 4.5 inches long x 6 inches high Model: 188.8.131.52.02.002 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. A screw-down crown (knob) creates a water-resistant seal. To uns crew the crown, turn counter-clockwise and pull/push into position to set time, date, and other functions.