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IWC 51111

Probable

The Big Pilot caliber of the 2000s, superseded by the 52xxx family. The seven-day reserve is the family signature and is checkable without opening the watch: the power-reserve hand should traverse a week. Pellaton winding is visible through a display back where the reference has one and is the family's identifying feature where it does not.

Specifications

Movement manufacturer
IWC
Power reserve
168 hours
Winding
automatic
Complications
Centre seconds · Date · Power reserve

Architecture

Automatic with Pellaton pawl winding and a single large barrel giving a seven-day reserve, with a power-reserve indication.

Related calibers

References using this caliber

Provenance of this record

Sources & Evidence

Secondary sourceCollector research

IWC collector research on caliber families and reference numbering

Collector communities and specialist dealers

Accessed
2026-08-18

Cited for

This referenceProbable
Primary sourceManufacturer documentation

IWC — collection and caliber specifications

IWC Schaffhausen

Accessed
2026-08-18

Cited for

This referenceHigh confidence
View source ↗

Last verified: Not yet reviewed