The Invicta Bolt Open Heart Dial Men's Automatic Watch (model 31173) is a bold, oversized timepiece featuring a 51mm stainless steel case with a polished finish and an exhibition caseback that showcases the self-winding automatic movement. The open heart dial design reveals the intricate inner workings of the 22-jewel mechanical movement, adding a sophisticated horological touch to the watch's aggressive Bolt aesthetic.

The watch features a black, silver, and white multi-function dial with chronograph subdials, luminous hands and indexes, a 24-hour indicator, date window, and small seconds. The stainless steel bracelet includes a 26mm band width secured by a double-locking fold-over clasp. Scratch-resistant crystal protects the dial, and the watch is water resistant to 100 meters (10 ATM), making it suitable for swimming and water sports.