Panerai Luminor 1950 3 Days GMT 24H Pam 531 44mm Swiss Power Reserve Pam00531

The main innovation relates to the so-called GMT function, which is indicated over 24 hours instead of 12 hours. The P.9003 also features a newly designed circular power reserve indicator on the back of the watch, which is visible through the sapphire crystal in the case back.

The P.9003 offers a power reserve of three days, achieved by two spring barrels connected in series. Is the watch being worn the oscillating mass winds in both directions, making the automatic winding mechanism very efficient.

In terms of setting time, the main hour hand – that is also connected to the date – can be moved independently and in jumps of one hour, without interfering with the minute and seconds hands. But when setting the time a device which stops the balance wheel and sets the seconds hand to zero comes into operation, so that time can be synchronised e. g. with a GPS reference time-signal.

The outermost part of the typical Luminor-dial carries the figures and indexes to correctly read the second zonetime that is indicated by the big hand with the arrow.

Movement:

Automatic mechanical, Panerai P.9003 calibre, executed entirely by Panerai, 13¾ lignes, 7.9 mm thick, 28 jewels, Glucydur-balance, 28,800 A/h (= 4Hz). Incabloc anti-shock-device. Power reserve 3 days, two barrels. 233 components.

Functions:

Hours, minutes, small seconds, date, second zonetime indication with 24h figures and indexes, seconds reset, power reserve indicator on the back.

Case: Diameter 44 mm, AISI 316L polished steel.

Bezel: Polished steel.

Back: See-through sapphire crystal.

Device protecting the crown: Brushed steel.

Dial: Black with luminous Arabic numerals and hour markers; 24h indication on the outermost part of the dial; date at 3 o’clock; seconds at 9 o’clock.

Crystal: Sapphire, formed of corundum, 2.6 mm thick. Anti-reflective coating.

Water-resistance: 300 metres