Name: Panerai Radiomir 8 Days Acciaio 45mm PAM00610 PAM00610
Brand: Panerai
SKU: 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.

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Uncommon#3 in familyOfficial press photos

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In-house manufacture caliber · caliber Panerai Caliber P.5000 (manual-wind, 8-day power reserve) · 192h power reserve (8 days)

Large case: suits wrists 7 in+ (18 cm+)

45 mm case. A bold, statement-size wear. Best suited to larger wrists where the case sits flush.

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Authentication

Wire lug attachment and 8-day winding resistance profile confirm authenticity; Cal. P.5000 through exhibition caseback.

Known issues in the market

Cal. P.5000 must show gradual resistance increase through 8-day winding; binding or sudden resistance indicates service need.
Exhibition caseback shows the P.5000 manual-wind architecture; verify caliber designation.

Area	What to check	What is correct	Red flag
case	Wire lug attachment	Wire bail lugs soldered to case; 45mm case diameter; no spring-bar holes	Spring-bar holes; incorrect case diameter; wire bails replaced with standard lugs
caseback	P.5000 caliber and power reserve	Cal. P.5000 designation; manual-wind architecture; 8-day power reserve indicator readable through caseback	Automatic rotor; non-8-day movement; incorrect caliber; power reserve indicator absent
crown	Winding resistance profile	Resistance increases gradually from empty to full over 8-day wind capacity; no binding at any point	Sudden resistance or binding; crown that reaches full wind too quickly indicating shorter reserve movement

Common legitimate replacements

Original Panerai strap on wire bails; factory replacement straps standard.

Expert resources: Panerai Radiomir 8 Days PAM00610 press materials. Panerai Cal. P.5000 documentation.

Authentication guide

Last reviewed June 2026

The Radiomir 8 Days PAM00610 is distinguished by its Cal. P.5000 manual-wind movement with an eight-day power reserve, an exhibition caseback displaying the movement, and wire lugs on a 45mm case. The extended power reserve and the signed exhibition caseback are the primary authentication points.

Known reproduction risks

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HIGH RISK

Replicas with flat-printed dials, solid machined lugs rather than wire, and ETA 6497 movements with a fake power reserve indicator showing 72 hours rather than 8 days.

Power reserve indicator calibrated to 72 hours rather than 8 days
Automatic rotor visible through the exhibition caseback: P.5000 is manual-wind with none
Flat-printed dial numerals without aperture sandwich depth under loupe
Solid machined lugs on a stated wire-lug Radiomir
Crown-protecting lever present on a stated Radiomir

The 8-day power reserve test is definitive and takes no tools. Wind fully and leave the watch on a surface. If it stops before 7 days, the movement is not Cal. P.5000.

MEDIUM

Radiomir references with 3-day (72-hour) calibers presented as the 8-day specification, typically by misrepresenting the reference number.

Power reserve scale calibrated to 72 hours or 3 days rather than 8
Movement visible through exhibition caseback with twin-barrel layout of the P.3000 rather than the P.5000 layout
PAM reference number on the caseback inconsistent with PAM00610

Dial variants by era

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Era	Description	Identifiers
PAM00610 production (2012 to 2020)	Sandwich dial in black with power reserve indicator, 45mm wire-lug cushion case, exhibition caseback, traditional crown without bridge.	No crown-protecting lever: this is a Radiomir Wire lugs at the case corners Power reserve indicator on the dial, calibrated to show 8 days of reserve Case diameter 45mm -- among the larger Panerai Radiomir configurations Sandwich dial with aperture-cut numerals and luminous indices "RADIOMIR 8 DAYS" or "RADIOMIR" and "PANERAI" text in the correct typeface "P.5000" caliber designation on the dial Small seconds sub-dial at 9 o'clock

Service part flags

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Wire lugs

Original: The PAM00610 uses wire lugs, consistent with the Radiomir 1940 family specification. The wire loops are soldered to the case body at a consistent gauge and finish.

Replacement tells

Solid machined lugs on a stated Radiomir 8 Days -- wire lugs are the architectural specification
Wire gauge inconsistent across the four lugs on the same example
Wire with visible gap or movement at the case attachment point

Exhibition caseback

Original: The PAM00610 has a signed exhibition caseback displaying Cal. P.5000. The movement is a manual-wind with eight-day power reserve. The bridges and plates should show Panerai-signed finishing. The caseback glass is sapphire.

Replacement tells

Solid caseback on a stated PAM00610 -- the exhibition back is a defining feature of this reference
Movement visible through the caseback that shows automatic rotor: P.5000 is manual-wind, no rotor
Movement bridge layout inconsistent with Cal. P.5000 documentation
Caseback glass with visible edge distortion suggesting mineral rather than sapphire

Power reserve indicator

Original: The 8-day power reserve indicator is calibrated for the P.5000's extended reserve. It should advance smoothly from full (8 days) to empty over the correct duration and reset correctly on manual winding.

Replacement tells

Power reserve indicator absent on a stated PAM00610 -- it is a defining feature
Indicator calibration that shows 3 days or 72 hours rather than 8 days -- indicates a P.3000-family movement, not P.5000
Indicator that sticks or advances unevenly

P.5000 caliber

Original: Cal. P.5000 is Panerai's manual-wind 8-day movement. It beats at 21,600bph and is completely in-house manufacture. No automatic rotor is present. The movement has a specific bridge layout visible through the exhibition caseback.

Replacement tells

Automatic rotor visible through the exhibition caseback -- P.5000 has none
Power reserve scale that tops out at 72 hours rather than 8 days
Movement finishing and signing inconsistent with Panerai in-house manufacture standards

Case back markings

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PAM00610 production

Exhibition caseback displaying Cal. P.5000
"PANERAI" and "RADIOMIR 8 DAYS" text on the movement plates or caseback surround
Reference PAM00610 and serial number on the case band
"SWISS MADE" on the caseback surround
Water resistance rating: 10 ATM / 100M
Caseback glass sapphire with no visible distortion at the edges

Movement tells

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Cal. P.5000 beats at 21,600bph -- the seconds hand advances in perceptible steps. This is correct behavior and not an authentication concern.
The 8-day power reserve is the primary functional test. Wind fully and note the stop time. A genuine P.5000 should run a minimum of 7.5 days under normal conditions. A watch that stops in 3 days has a different caliber installed.
Manual-wind mainspring winding should have smooth, progressive resistance with no sudden release or slipping. Any clicking or slipping while winding indicates a worn click mechanism.
Cal. P.5000 has no automatic capability. Shaking or rotating the watch should have no effect on the power reserve level -- any movement in the power reserve from wrist motion indicates a non-original automatic caliber.
Panerai recommends service every 5 years for the P.5000. A watch well outside this window may show lubricant degradation visible as sticky rate inconsistencies on a timegrapher.

Sources: Panerai -- Radiomir 8 Days PAM00610 and Cal. P.5000 specification; WatchUSeek -- Panerai Radiomir authentication forum; PaneraiCentral -- P.5000 eight-day caliber identification guide.