1970/71. 18 ct. yellow gold, marked. Whitegold, matfinished dial, indices and hands illuminated, date aperture, labelled 'Rolex Oyster Perpetual Datejust', 'Superlative Chronometer Officially Certified', 'TSwissT'. Folding clasp marked 'Rolex Geneve RolexSA 750 Swiss Made'. Case bottom screwable. Serial no. 2820539. With Rolex box and certificate of chronometer. Partly traces of usage. Diameter 26 mm, weight approx. 62,5 g.