Early this year at Baselworld, Patek Philippe introduced the ref. 5960/1A Annual Calendar Chronograph in stainless steel, which as of this year, replaces the production of all ref. 5960s in gold and platinum.
The Patek Philippe Annual Calendar Chronograph Ref. 5960/1A-001 features a number of design changes. First, it has a new monocounter register at 6 o’clock that has been reconfigured with minutes (60-minutes) on the inside and hours (12-hours) on the outside. Second, it has a new bezel that is tapered slightly different at the base than previous 5960s. Third, is the debut of a stainless steel “drop” links bracelet. Finally, it has a new silvery-gray dial the utilizes striking red accents and a black applied hours markers, hands, chronograph subsidiary dial and apertures.
According to Patek Philippe, “The movement is a prime example of tradition paired with innovation. It combines the classic column-wheel control concept with a modern vertical disk clutch that eliminates the risk of hand jump or recoil when the stopwatch function is activated. The clutch is practically friction-free, so that the chronograph hand can be used as a permanently running seconds hand if desired.”
In-house caliber CH 28-520 IRM QA 24H has 456 total components, including 14 bridges and 40 jewels. It features a Gyromax balance wheel and a Spiromax balance spring. It beats at 4Hz and has maximum reserve of 55-hours. The central rotor is in 21K gold.
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