An Oversized Fine and Rare White Gold Wristwatch, Patek Philippe & Co., Genève, Movement No. 726243, Case No. 308042, Ref. 570, Circa 1955

18k, Cal. 12'''-400, nickel lever movement, 18 jewels, bimetallic compensation balance, micrometer regulator, silvered matte dial, applied white gold baton markers, white gold dauphine hands, engine-turned subsidiary seconds, large circular case with flat bezel, downturned lugs and snap back, case, dial and movement signed with an 18k white gold Patek Philippe buckle.

Patek Philippe introduced this model, Ref. 570, in 1938. A calatrava model, it has become one of the most iconic oversized watches made by the company.

For a similar example, see Huber & Banbery, Patek Philippe Wristwatches, Vol. 2, Second Edition, p. 170, pl. 262.