Patek Philippe Debuts Destro Ref. 5373P Split-Seconds Monopusher Chronograph Perpetual Calendar

It’s not close to Christmas yet but we’re definitely getting some early gifts with some of these new Patek Philippe releases. The new Nautilus is deservedly going to get a lot of attention but if you’re like me, a destro Split-Seconds Perpetual Calendar is where the real action is (and I’m not even a leftie!). The new Patek Philippe Ref. 5373P-001 Split-Seconds Monopusher Chronograph with perpetual calendar is a mirror-take of the Ref. 5372 in a fresh charcoal dial with punchy splashes of red to keep things a little colorful.

Notably, Patek confirms that moving forward this Ref. 5373 will be the only model with this movement produced as the Ref. 5372P-001 and 5372P-010 will be discontinued. Sorry, fellow righties!

The Ref. 5373 is done in 950 platinum case that measures 38.3mm wide and 12.93mm thick and, obviously, has the crown and chronograph pushers at 9 and 8 o’clock rather than 3 and 4 o’clock. Of course, as with all platinum Pateks, there is a diamond set into the case band which would ordinarily be at 6 o’clock but is set at 12 o’clock here. This ‘destro’ layout isn’t exactly a first from Patek but the unique piece it’s inspired by was released in 1927 almost a century ago now.

I’d love to be able to hold a now-discontinued 5272 side by side with this ‘destro’ 5373 since there really are not many, if any, opportunities to see literal mirror views of such an incredible movement. Naturally, this makes for a rotated dial as well. Flip the 5372 at a 180° angle and we now have the date at 12 o’clock, seconds sub-dial at 3 o’clock, moon phase at 6 o’clock, and 60 minute counter at 9 o’clock. Day, month, and leap-year apertures are now at 10:30 with day/night indicator at 1:30. There’s bound to be at least one ambidextrous Patek collector that’s going to have both a 5372 and 5373, right?

As for the dial, it’s done in charcoal with vertical satin-finishing and red-varnished chronograph and split seconds hands cutting through with some color. The Arabic numerals are done in applied white gold as are the faceted Dauphine hour and minute hands. There’s quite a bit of detail in the sub-dials as well, which have snailing and lacquered white gold hands.

Naturally the attention to finishes is as impressive on the movement side with Geneva stripes, chamfering, and polished edges throughout. Of course, at this level one expects the best of the best in movement finishing with hand-finished interior angles as well. As aforementioned, the caliber CHR 27-525 PS Q is a manually wound split-seconds column wheel chronograph with perpetual calendar, day/night indicator, and moon phase. Operating at 21,600 vph, it has a power reserve that is a minimum of 38-hours and a maximum of 48-hours with the chronograph uncoupled.

Finally, there is that black calfskin strap with embossed textile texture with red stitching that matches the red dial hands with the foldover clasp done in platinum. Pricing for the Patek Philippe Ref. 5373P-001 Split-Seconds Monopusher Chronograph is available on request. You can learn more at

Leave a Reply