Panerai Luminor 31 Giorni PAM01631: Month-Long Power Reserve in Goldtech Case
Panerai's Flagship Release: The Luminor 31 Giorni PAM01631
As the standout release from Panerai at Watches & Wonders 2026, the Luminor 31 Giorni PAM01631 delivers a staggering 31-day (744-hour) power reserve—the longest of any Panerai model ever produced. Limited to 200 pieces, this Goldtech-clad manual-wind Luminor represents the pinnacle of Panerai's long-standing pursuit of extended autonomy.
Decades of Power Reserve Innovation
Panerai's history of extended power reserves dates back to the mid-1950s, when the brand began supplying watches with multi-day autonomy to the Italian Navy. The 31 Giorni ("31 Days") collection celebrates this heritage with a thoroughly modern execution. The Calibre P.2031/S, featuring 276 components and 25 jewels, achieves its remarkable power reserve through four mainspring barrels that together account for 3.3 meters of mainspring.
Key Specifications
| Reference | PAM01631 |
| Case | 44mm Goldtech (18k rose gold alloy) |
| Dial | Skeletonized with polarized date display |
| Power Reserve | 31 days (744 hours) |
| Limited Edition | 200 pieces |
| Price | $107,000 USD |
Engineering Highlights
Despite requiring 3.3 meters of mainspring, the PAM01631 can be wound entirely through its crown in a manageable 128 rotations—a significant engineering achievement compared to watches like the A. Lange & Söhne Lange 31 that require specialized tools. A Torque Limiter system maintains optimal tension within the mainsprings by selecting an ideal 31-day operational window from a potential 36-day power reserve. After 31 days, the movement stops completely to ensure maximum accuracy throughout the entire power reserve period.
Technical Specifications
| Movement | Calibre P.2031/S, manual-winding, 276 components |
| Jewels | 25 |
| Frequency | 21,600 vph (3Hz) |
| Water Resistance | 100 meters |
| Crystal | Domed sapphire (front and caseback) |
Related Reading
- Panerai's Long Power Reserve Tradition: From 3 Days to 31 Days
- Understanding Panerai's Goldtech Alloy
Frequently Asked Questions
How long does it take to fully wind the PAM01631?
The PAM01631 requires approximately 128 crown rotations to achieve its full 31-day power reserve, making it practical for everyday winding without specialized tools.
What is the Torque Limiter system?
The Torque Limiter selects an optimal 31-day operational window from a potential 36-day power reserve. It stops the movement after 31 days to maintain maximum accuracy throughout the entire power reserve period.
What is Panerai's Goldtech?
Goldtech is Panerai's proprietary 18k rose gold alloy containing gold, copper, platinum, and silver. The platinum and silver additions enhance durability and color retention compared to standard rose gold.
Source
Based on hands-on reporting from aBlogtoWatch (April 13, 2026) by Ripley Sellers with photography by Ed Rhee.