Radiomir 8 Days Acciaio 45mm PAM00610

The PAM00610 makes the case for manual-wind with a single number: eight days. Wind it on Sunday, and you still have reserve the following Sunday. That power buffer, built into Panerai's in-house P.5000 caliber, is the reason this watch has a following.

What it is

Panerai introduced the Radiomir 8 Days PAM00610 in 2012 as a steel-cased expression of the P.5000, the brand's first in-house manual-wind caliber with a serious power reserve. The Radiomir lineage traces back to Panerai's pre-commercial military era, when oversized cushion cases and wire lugs were functional requirements for Italian Navy divers, not design choices. The PAM00610 carries that case architecture forward in 45mm steel with a clean sandwich dial and the power reserve display at 12 o'clock, showing seven complete winds.

Production ran until 2020, when Panerai consolidated the Radiomir collection around updated references. It was never a high-volume piece, which keeps the used market reasonably tight.

Buying notes

The 45mm case sits well outside contemporary sizing preferences, and there is no avoiding it: this is a large, thick watch built for wrists that can carry it. Verify the crown and crown-protection device are intact and functioning correctly before buying; replacement parts for discontinued references can extend service timelines. The power reserve subdial hand is a delicate component, and examples that have been dropped or mishandled sometimes show erratic reserve indication without other visible damage.

Confirm service history if possible, since the P.5000 has a complex mainspring system spanning two barrels, and a watch that has sat unwound for years benefits from a fresh service before regular wear. Dial condition matters significantly on the secondary market: the sandwich construction can show moisture intrusion at the edges if the case seal has degraded.

Market read

The PAM00610 trades in the $4,000 to $6,500 range on the secondary market depending on condition, box-and-papers status, and whether the example has recent service documentation. Prices have held relatively stable since discontinuation; the 8-day reserve gives this reference a clear technical identity that prevents it from being interchangeable with simpler Radiomir variants. Box and papers do not command the same premium here as on sportier Panerai references, but a complete set still adds several hundred dollars to a asking price.

Service expectations

The P.5000 caliber is a Panerai in-house movement with a dual-mainspring barrel arrangement that delivers the 8-day reserve. Panerai recommends service intervals of approximately five years, though collectors report longer intervals without issue if the watch has been stored properly and wound regularly. Both Panerai service centers and qualified independent watchmakers with experience on large-format manual-wind movements can handle the P.5000, though Panerai is the only source for proprietary components if anything needs replacement.