This bulova men’s watch from the maquina collection offers daringly avant-garde design. With its mechanical heart and unrivaled modern form, this timepiece offers a uniquely bold individual expression of style. 40mm black-tone tonneau-shaped stainless steel case with black bezel; transparent case back rainbow-colored textured dial with black hands; silver-tone markers with luminescent fill; central aperture double-curved sapphire crystal 21-jewel automatic movement; 42-hour power reserve black-tone stainless steel bracelet; push-button deployment closure 100-meter water resistance