The IWC 51950 is an in-house automatic chronograph caliber introduced in 2017, belonging to the 51xxx family. It features the proprietary Pellaton winding system, which IWC has refined over decades for reliability, paired with a 7-day power reserve—a notable achievement for a chronograph movement. The caliber remains in production and serves as the base for contemporary Portugieser Chronograph models.
TECHNICAL SPECIFICATIONS
Movement Type
Automatic
Jewel Count
54 jewels
Power Reserve
168h
Frequency
19,800 vph (2.8 Hz)
Display Type
Analog
COMPLICATIONS
QUICK FACTS
BRAND
TYPE
AutomaticSTATUS
In ProductionMANUFACTURE
In-houseLAUNCH YEAR
2017CALIBER FAMILY
51xxxALSO KNOWN AS
FOR WATCH DEALERS
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Watches with this movement
IWC Schaffhausen
Portugieser Perpetual Calendar Tourbillon
IW504504
IWC Schaffhausen
Portugieser Perpetual Calendar Tourbillon
IW504505
IWC Schaffhausen
Portugieser Perpetual Calendar Tourbillon
IW504506
IWC Schaffhausen
Big Pilot’s Watch Perpetual Calendar Tourbillon Le Petit Prince
IW504901