Chronograph 130

Patek’s first chronographChronographA watch function for starting, stopping and resetting an elapsed-time measurement independently of the ordinary time display. made in series: a 33 mm Calatrava-style case with discreet square pushers. Serial production began in 1934 and took the number 130 when references were introduced in 1936; the movementMovementThe working mechanism inside a watch or clock. switched that year from a Victorin Piguet ébaucheÉbaucheAn incomplete movement supplied for further work before it becomes a finished watch mechanism. The parts included in an ébauche have varied by period and supplier; the term does not by itself specify a complete, assembled movement. to the Valjoux-based 13'''. About 1,500 made.