Reference number: 7031/0 Brand: Tudor Model (timepiece): Montecarlo Serial number: 759xxx Power source: hand-wound Strap material: crocodile leather Year: 1971 Accessories: with generic box Calibre Power source: hand-wound Number of jewels: 17 Case Diameter: 40 mm Height: 13 mm Crystal: Plexiglas Restored grey dial. Dial markers: Arabic numerals Strap Strap material: crocodile leather Strap colour: black Clasp: buckle Clasp material: steel Functions: Chronograph, date, tachymeter Other information: Screw-down crown The TUDOR Oysterdate 7031/0 reference corresponds to one of the first two chronographs produced and marketed by TUDOR. Much appreciated by collectors in the same way as the twin reference 7032/0, it differs from the latter only for its black Plexiglas bezel with a tachymetric scale graduated up to 500 units, especially useful for calculating average hourly speeds between two points. The 39 mm diameter case houses the Valjoux 7734 mechanical hand-wound movement which guarantees a power reserve of over 45 hours. The case back is engraved with the writing 'ORIGINAL OYSTER CASE BY ROLEX GENEVA'. Placed at 3 o'clock and at 9 o'clock are the two sub-dials of the famous grey and black dial, flecked by the characteristic markers which respectively measure the continuous seconds and the elapsed minutes of the chronograph function. Shipping: tracked and insured with DHL. Any customs duties are to be paid by the buyer. Reference: https://aste.catawiki.it/lotsfrom/blackgold https://www.catawiki.it/order/feedback/blackgold