Up 2% over the past 90 days
Based on eBay sales, last 12 months
Pre-owned watches trade across a wide condition spectrum. These ranges are typical for the secondary market.
The Master Perpetual Calendar in steel is one of the better values in the perpetual calendar category; secondary prices are stable because the in-house caliber is reliable and the steel case is relatively uncommon for a watch at this complication level.
Editorial estimate, 2026 Q2. Actual prices vary by condition, date, and box/papers status.
Community + OSINT signals haven’t landed for this reference yet. We don’t publish a rating against zero signal — the number would mean nothing. Editorial body + caliber + market value still surface above; ratings appear once the signal corpus does.
The perpetual calendar module must never be advanced between 9pm and midnight; service records should confirm correct winding protocols were followed.
| Area | What to check | What is correct | Red flag |
|---|---|---|---|
| dial | Four aperture calendar accuracy | Day, date, month, and leap year apertures all showing correct current values | Any aperture showing incorrect value; calendar that requires manual correction more than once every four years |
| caseback | Cal. 868/1 movement integrity | Cal. 868/1 visible; complex bridge layout consistent with perpetual calendar module | Any caliber other than 868/1; missing bridge components in the perpetual calendar module |
| crown | Calendar advance function safety | Calendar correctors operate smoothly with no binding; no evidence of calendar advance during forbidden hours | Any resistance in calendar corrector operation; service history showing incorrect advancement protocol |
The Master Perpetual Calendar is JLC's full-complication perpetual calendar: day, date, month, leap year, and moonphase all displayed simultaneously. Verifying that all indications advance correctly through at least one calendar cycle and that none require manual correction except for the defined manual operations is the functional authentication standard.
| Description |
|---|
| Identifiers |
|---|
| 2020 to present (current Q5013480) | Blue or silver dial with the full perpetual calendar layout. Five calendar indications plus moonphase arranged around the dial field. |
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