Panerai Radiomir Mare Nostrum 52mm (PAM300) Swiss

Just like IWC did just a couple of days ago, Panerai has presented several new models for the year of 2010. One of the most interesting models in this PR tsunami is the new Gargantuan-sized Mare Nostrum PAM 300 hand-wound chronograph.

The Mare Nostrum PAM 300 was officially presented during the SIHH 2010 trade show.

Originally designed for the Italian Navy in the mid-1940s as an “officer’s deck watch,” the Mare Nostrum series was put in production only 50 years later sporting a two-register chronograph functionality and a tachymeter scale. This is, as far as I understand, the second iteration.

Panerai Radiomir Mare Nostrum (PAM300)

Although the case looks rugged and ready for a good piece of the action, it is not rugged enough to withstand any serious water pressure and is by no means a diving tool. More than that, Panerai officially rates it for only 30 meters, which means that it is not a good idea even to take a shower while wearing this watch, not to say swimming or snorkeling.

Frankly, I don’t understand why have they decided not to make it truly water-resistant. I mean, with its huge case measuring 52 millimeters in diameter and also quite thick, there seems to be plenty of space to insert the needed gaskets to make the steel body watertight. Probably, some marketing reasons.

Panerai Radiomir Mare Nostrum (transparent caseback, Minerva-based Panerai OP XXVIII Calibre)

Details are scarce, but, judging by the photos, this PAM300 is powered by a rare Panerai OP XXVIII Calibre. First introduced back in 2008 to animate the brand’s oversized timekeepers, the mechanism is based on the vintage Minerva 13-20 movements produced from the 1920s till 1940s. The interesting thing about this Minerva mechanism is that it was re-introduced in the early 2000s as Caliber 13-21 offering the same design, but built to much higher tolerances afforded by modern CNC equipment. Still, possibly to give their timekeepers some extra vintage vibe, Panerai decided to use the original NOS Caliber 13-20 as a base for their own movement.

Like it is almost always the case when dealing with “historic” engines, each Minerva movement was disassembled, cleaned, oiled and then put together again to power this limited edition model. Predictably, the mechanism was also redecorated with bridges now featuring vertical Geneva stripes and beveled edges, while the screws were polished and the rest of the parts machine brushed for an even more three-dimensional look.

By the way, the same movement was installed in the 2008 Panerai Ferrari FER-24 Chronograph.

With a price of $36,000 (MSRP, will vary in different parts of the world,) the PAM300 is expensive, especially given the fact that it is crafted with nothing more than ordinary 316L stainless steel. However, the vintage movement that serves the base for the Panerai caliber greatly increases its “value for money” rating although I still can’t call getting one of these little monsters a rational choice.

See also: Panerai Radiomir Titanium PAM 349 California Edition

Panerai Radiomir Mare Nostrum 52mm PAM300 (side view)

Photos: Panerai

Panerai Mare Nostrum PAM 300 specification

Price range: $36,000 (MSRP)
Movement: Panerai OP XXVIII Calibre, Minerva-based, Swiss Made
Winding: Hand-wound
Jewels: 18
Movement frequency: 18,000 vph
Functions: Hours, minutes, small seconds
Complications: Chronograph
Power reserve: 42 hours
Case: Stainless steel
Shape: Round
Transparent back: Yes, sapphire crystal
Size: 52.00 mm
Dial: Black
Hands: Blue with a luminescent substance
Strap: Green cloth
Crystal: Sapphire
Water resistance: 30 meters


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