BALL ENGINEER MASTER 11 DLC BLACK STAINLESS STEEL BRACELET WATCH NEEDS A TUNE UP ***this is a self winding watch. It uses a persons movement and kinetic energy to run. It is a Swiss auto-wind movement watch. It will start running over time as you wear it. This doesn’t mean it’s broken or won’t run*** Movement • ETA Cal. 2836-2, 25 jewels Swiss Auto-wind • Functions • Day/Date calendar, window display Case • Highly polished finish • Solid Stainless steel • Black DLC (Diamond Like Carbon) scratch resistant coating Crown • Factory Logo engraved/embossed • Sport style, screw-down (threaded) • Crystal • Sapphire • Anti-Glare treated • Very slight dome profile Dial • Black color • Yellow 0-60 numerals • 51 micro gas light (3H) tubes on hour, minute, second hands and dial for night reading capability Hands • Steel color • Tritium luminous filled Case Back • Screw-down style (threaded) • Factory Engraved/Raised Logo Band • Black color • Genuine rubber • Factory Logo embossed Clasp • Traditional tang style • Factory Logo engraved/embossed • Water Resistance • 100m/330ft /10atm BALL Chronometer  Manufacture Caliber RRM7309-CS Swiss made mechanical movement Anti-magnetic silicon balance spring Dimensions: Ø 34.24mm, height 5.16mm Functions: Hours, minutes, sweep seconds and date Winding: Automatic Vibrations: 28,800vph, 4Hz Power reserve: 80 hours Anti-magnetism: 2,500G / 200,000A/m Jewels: 25”