Patek Philippe & Cie, Genève, No. 977417, case No. 2615124,Ref. 2554. Production of this reference started in 1952.Extremely rare elongated hexagonal 18K yellow gold gentleman's wristwatch with an 18K yellow gold hammered flat bracelet. two-body, solid, polished, pyramidal concave sides, "bombé" crystal. hammered yellow gold with applied gold indexes, auxiliary seconds dial. "Epée" yellow gold hands. Notes This model inspired Patek Philippe to produce their famous new 10- day wristwatch, Ref. 5100, in the year 2000.