Bulova Marine Star Chronograph

Bulova Marine Star chronograph , Swiss.  Made in the 1970s. Fine and rare stainless steel chronograph wristwatch with second, hour and 30 minute registers, bi-directional rotating bezel calibrated to 60 minutes. Case: Three-body, polished and brushed, screwed-down case back engraved: "Bulova Marine Star Swiss made,"  graduated bi-directional revolving black bezel, lapidated lugs. Dial: Black with luminous baton numerals, subsidiary seconds and 30-minute register dials, outer 1/5th second track with 5-second Arabic markers. Luminous steel baton hands. Movement: Calibre Valjoux 7731, rhodium-plated, 17 jewels, straight-line lever escapement, monometallic balance, shock absorber, self-compensating flat balance spring, index regulator. Diameter: 42.5mm thickness: 14mm Circa 1970s  More about Bulova: Bulova was founded in New York City by Joseph Bulova in 1875. The company was very successful producing and selling watches in the USA. In 1912 they expanded their production by establishing a