Rolex 1603 blue dial pi on sigma dial Circa 1976 Brought it short while ago but want to buy something else. It has Rolexes cal 1570. NOTE: it has definitely been worn but and has started to form a tropical effect on the edges of the dial . It has been worn so there are scratches on the glass but hardly noticeable .Keeps time very well . Single quick-set. Thank you
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