Marvel at the inner workings of this dual aperture dial self winding mechanical from the bva series, featuring clear exhibition caseback. The 21-jewel self winding and manual movement means eco-friendly battery-free operation and provides for years of reliable service. The crisp black dial includes a wealth of details including roman numerals, minute track and two sub dials in a 42. 0mm stainless steel case. All stainless steel construction provides hypo-allergenic and durable build quality. The watch band secures with a push-button deployment clasp and is water resistant up to 30 meters. It comes with a three-year limited warranty. We are an authorized bulova dealer.