Rolex - The Geneva Watch Auction: XIII Lot 77 May 2021 | Phillips
Le Monde Edmond | Rolex 1831: The King of day-dates
ROLEX, REF. 1831 PLATINUM DAY-DATE, STELLA DIAL, NO. 05, ONE OF EIGHT EVER PRODUCED Rolex, Oyster Perpetual, Day-Date, Superlative Chronometer Officially Certified, case No. 5086932, Ref. 1831. Sold in 1977 to Iran.
Le Monde Edmond | Rolex 1831: The King of day-dates