Luminor 1950 Submersible Slytech Chrono 1000m White

In Context

At 47 mm this is exceptionally large for something worn on a wrist, closer to a pocket watch given lugs. The case back is closed, so the movement stays out of sight, and the sapphire crystal will resist everything short of deliberate abuse. 1000 m is a professional diving rating, far past any demand a wrist is likely to make of it.

The movement winds itself from the motion of your wrist. 46 hours of reserve carries it overnight, but not through a weekend in a drawer. At 28,800 vph the seconds hand advances 8 times a second.

PAM00225 stands on its own in this catalogue — no other reference here shares its base number. It pairs a white dial with a titanium case. It was a limited edition.

The OP XII is Panerai's Valjoux 7753, the chronograph with its counters at 3, 6 and 9 o'clock, finished and certified by the COSC. It powers 27 watches in this library. The 7753 rearranges the 7750's counters to the horizontal axis and moves the date correction to a pusher, and the [7750 piece](/blog/the-valjoux-7750-family) explains the base's cam-actuated chronograph. Panerai's version runs at 28,800 vph with a 46-hour reserve and 27 jewels at 30 mm across, and it carried the Luminor Chrono and the Luminor Chrono Daylight through the 2000s before the in-house [P.9100](/calibers/panerai-p-9100) arrived in 2013. In the library it powers 13 [Luminor](/brands/panerai/luminor) references, most of them Chrono Daylight boutique editions, 7 [Ferrari](/brands/panerai/ferrari) chronographs, 4 [Submersibles](/brands/panerai/submersible) and 3 [Radiomirs](/brands/panerai/radiomir). Cases run from 40 mm to 47 mm, with 44 mm and 45 mm the most common. 9 are limited editions. The [OP III](/calibers/panerai-op-iii) is the 7750 with its chronograph removed, the time-only automatic of the same years, and the [OP VIII](/calibers/panerai-op-viii) the other Valjoux-based chronograph in the range.

26 other watches in the library run the Panerai OP XII.

Panerai

Radiomir Chrono for China

PAM00370 · 42 mm

L

Panerai

Luminor Submersible Chrono for Sylvester Stallone

PAM00269 · 47 mm

Panerai

Luminor Submersible Chrono 1000M

PAM00187 · 47 mm

Panerai

Luminor Chrono Daylight Ivory

PAM00251 · 44 mm