Introducing the new Patek Philippe ref. 5270 perpetual calendar chronograph

Baselworld 2011 has just opened and one of the most anticipated watches is the replacement for the ref. 5270G from Patek Philippe, the latest in a long history of chronograph with perpetual calendar wristwatches.

Fifth in a long line of such complications the Geneva house (it is preceeded by the refs. 1518, 2499, 3970, 5970), but it is the first entirely in-house model of this complication – that is in itself a sign of how the industry has changed. 

It utilises the CH29 calibre, first seen in the 5170J, with the addition of a calendar module, making it the CH 29-535 PS Q.

The Patek Philippe CH29

The two apertures at 4:30 and 7:30 are the leap year and day/night indicators respectively (pictured right).

Based on this photo alone, the short indices from three to nine o’clock seem a bit unbalanced, but the curved lugs are a nice detail.

The case is in white gold only for now. It measures 41 mm in diameter, one mm wider than the 5970 it replaces.

Like the rest of the Patek Grande Complications it is presented with two casebacks, one solid and the other sapphire. In practice that means the watch is sold with the sapphire case back and the solid back remains sealed in the factory pack.

Technical specifications

Movement Hand-wound, CH 29-535 PS Q calibre Functions Hours, minutes, seconds, perpetual calendar (date, day, month and leap years), chronograph, moon phase and day/night indicator Case 18K white gold, 41 mm; Sapphire crystal; Interchangeable solid back and sapphire crystal back; Water-resistant to 30 m / 3 ATM Dial Silvered opaline; Black oxidised white-gold hourmarkers and hands Day and month windows at 12 o’clock Moon phase and date at 6 o’clock Day/night indicator at 7.30, leap year indicator at 4.30 Instant 30-minute counter at 3 o’clock and small seconds counter at 9 o’clock Bracelet/Strap Matt black, hand-stitched, square-scale alligator leather with 18K white gold folding clasp


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