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Rolex 1575

Probable

Fitted to the Submariner Date 1680, GMT-Master 1675 and Datejust references of the period. Jewel count is given as 26 by most caliber databases and as 25 by at least one; the disagreement is unresolved and tracked as a research gap rather than settled here. The date is non-quickset — advancing it requires cycling the hands through midnight, which is correct behaviour and not a fault.

Specifications

Movement manufacturer
Rolex
Base caliber
Rolex 1570
Production
1965–1981
Frequency
19,800 vph (2.75 Hz)
Jewels
26
Power reserve
48 hours
Diameter
28.5 mm
Winding
automatic
Complications
Centre seconds · Date · 24-hour hand (GMT execution)
Balance
Free-sprung, Microstella regulating nuts
Rotor
Full rotor, bidirectional
Certification
Officially Certified Chronometer

Architecture

The 1570 with a modular calendar mechanism added under the dial. GMT-Master examples additionally carry the 24-hour hand work.

Authentication notes

  • ServiceHigh confidence

    Non-quickset date is correct, not a defect

    The 1575 has no quickset. A seller or examiner unfamiliar with the caliber may report the absence of quickset as a fault or as evidence of an incorrect movement. It is neither: quickset arrived with the 3035 in the late 1970s.

Service practice

Rolex service in later decades commonly fitted replacement date wheels; a service date wheel with a different font from the original is a documented service outcome, not evidence against the watch.

Open questions

OpenConflicting researchMedium

Rolex 1575 jewel count

Does the Rolex calibre 1575 carry 25 or 26 jewels, and did the count change during production?

Best current answer

26 jewels, which is the figure given by the majority of caliber databases and recorded on the movement record.

Conflicting claims

At least one caliber database lists 25. It is not established whether this is an error, a different execution, or a change during the caliber's sixteen-year production. The parallel case of the Omega 861 — where the jewel count genuinely changed mid-production — means the discrepancy cannot be dismissed as a transcription error.

Related calibers

References using this caliber

Provenance of this record

Sources & Evidence

Secondary sourceCollector research

Ranfft Watch Movement Archive

Dr. Roland Ranfft (archived and maintained by volunteers)

Accessed
2026-08-18

Cited for

This referenceProbable
View source ↗
Secondary sourceSpecialist publication

Quill & Pad — Exceptional Movements In History: Rolex Caliber 1575

Quill & Pad

Accessed
2026-08-18

Cited for

This referenceProbable
View source ↗

Last verified: Not yet reviewed