The feel of the 2015 Mare Nostrum or PAM00603 unveiled in Geneva at the Salon International de la Haute Horlogerie came with a surprise.
That is because it is very lightweight relative to its 52mm diameter case. The reason for this is a case made of titanium. The previous re-edition, the PAM 300 Mare Nostrum of 2010 came in steel.
The case and crown of the 2015 PAM 603 Mare Nostrum have a brushed titanium finish. Titanium, as the brand reminds us, is not just lighter than steel but has non-allergenic properties and is able to withstand high pressure, external stress and corrosion.
The 52mm diameter case should not come as a surprise, especially for those who have come across or read of the PAM 300 Mare Nostrum of 2010 as it is said that this is the same diameter of the prototype that was produced in 1943 for deck officers of the Italian Navy.
However, the Mare Nostrum never went into production due to the escalation of the Second World War. Only two or three prototypes were made, notes Mario Paci in the book Panerai watches.
The PAM 603 Mare Nostrum houses the Calibre OP XXV which uses the base Minerva 13-22 manual-winding movement with the column wheel chronograph. While there is no doubting that this is a quality movement with high-finishing, the PAM 603 has a closed case back.
This is unlike the 2010 PAM00300 Mare Nostrum which features the same Minerva base movement and has an open display case back.
For those not in the know, the Latin word mare nostrum means “our sea” when translated to English. According to our progress on its website ourprg.com, the term mare nostrum began to be used by Romans following their conquests of Sicily, Sardinia and Corsica after the first Punic wars.
By 30 B.C., as Roman rule extended from the Iberian Peninsula to Egypt, mare nostrum could be used to refer to the entire Mediterranean sea.
The Panerai Mare Nostrum PAM 603 is limited to 150 pieces. The 2010 version of the Mare Nostrum PAM 300 was limited to 99 pieces.