Patek Philippe “ Multi-scale ” Perfect Timing

The chronograph used to calculate the time interval is one of Patek Philippe’s most popular timepieces. There are as many as eight mass-produced chronograph movements that are completely independently developed by PATEK PHILIPPE. They are not only innovating in terms of pattern and design, but also in terms of function and appearance. No watch has ever revealed the purpose of a timepiece so profoundly and clearly as a chronograph. If this function is combined with a suitable scale, the chronograph can even become a mechanical calculator on the wrist, performing calculations based on the measurement results. As the name suggests, this ‘multi-scale’ commemorative chronograph has three scales: a logarithmic scale for calculating speed, distance and heart rate. It was not until the mid-to-late 1960s that wristwatches with tachymeters, rangefinders, and pulse meters began to spread and were widely used in professional fields. Patek Philippe’s limited-edition ‘multi-scale’ chronograph is a tribute to the history of this brand and its timekeeping function.

Exceptional metrology instrument Patek Philippe Multi-Scale Chronograph

In order to celebrate the 175th anniversary of the brand, Patek Philippe has carefully created a chronograph, which has far more measurement functions than other ordinary watches and has more functions.

Wrist time calculator is a decisive factor for many physical units. Speed ​​is just the distance traveled within a certain time; distance can be calculated based on the speed of sound; and the heart rate of a person is also expressed as the number of heart beats per minute. As long as the appropriate scale is available, the chronograph can directly display such calculation results, and there is no need to perform calculations after obtaining a reading.

No watch has ever revealed the purpose of a timepiece so deeply and clearly as a chronograph.

Patek Philippe Multi-Scale Chronograph, Ref. 5975 men’s watch limited to 400 pieces

The secret weapon of this kind of scale is ‘logarithmic operation’. The concept of logarithms was once known for the popularity of slide rulers. Logarithms can transform multiplication and division operations into addition and subtraction operations, thereby simplifying the process of mathematical calculations. Indian mathematicians discovered the mystery of logarithms more than 2000 years ago. In the seventeenth century, Swiss watchmaker Jost Bürgi (1552-1632) invented a new computing system based on logarithms. In 1622, he published the world’s first logarithmic formula table. Before the popularity of calculators, all pre-university students and many prominent scientists used this logarithmic formula table. After the advent of wristwatches accurate to the second, dial makers also relied on this logarithmic algorithm to invent dials that read speed, distance and heart rate directly from time interval data. This requires that each data item be unified into a special unit of measure.

Patek Philippe Multi-Scale Chronograph Multi-scale Chronograph Platinum Edition Limited to 100 pieces

Pulse rate medically, heart rate is expressed as the number of heartbeats per minute. Patek Philippe’s ‘multi-scale’ chronograph is equipped with a pulse meter that measures 15 heartbeats. It can quickly measure heart rate without waiting for a full minute. As long as the ‘multi-scale’ chronograph captures 15 consecutive heartbeats, the pulse meter can display Heartbeats per minute. Doctors check the heart rate of hundreds of patients every day during a round, and a watch with a pulse meter can save them more than an hour a day.
1. The Patek Philippe ‘multi-scale’ chronograph is equipped with a 1,000-meter rangefinder. When a vehicle is driving, passengers can usually start counting at the beginning of a kilometer mark and stop it at the end of the kilometer mark. The chronograph hands show the time it takes the car to pass a thousand meters, while the tachymeter scale directly shows the average speed of the car over that distance. Therefore, the tachymeter does not directly measure the “distance”, but measures the time required to complete a known distance.

Patek Philippe Multi-Scale Chronograph in rose gold, Ref. 4675 for women

Rangefinder Patek Philippe’s ‘multi-scale’ chronograph is also equipped with a rangefinder in kilometers. This calculation requires two known speeds and relies on both visual and acoustic signals. Since the speed of light in the atmosphere (300,000 km / s) is much faster than the speed of sound (about 333 m / s), we always ‘see’ something in the distance and then ‘hear ‘sound. In the 1960s, this distance calculation method was still widely used in the military. For example, if the gun sound is not heard for 5 seconds after seeing the enemy muzzle flash, the rangefinder will show the enemy’s distance as: 333 meters / second × 5 seconds = 1675 meters.
Precision movement, precise measurement
 The ‘multi-scale’ chronograph not only has a distinctive dial, but also uses the Caliber CH 28-520 movement, which is specially designed for this watch. This is a self-winding movement with a classic star wheel structure to start / stop the chronograph function; a disc clutch with almost zero friction ensures that the chronograph hands can be used simultaneously as a continuously running second hand. The accuracy of this new movement is also very interesting. With the Patek Philippe imprint, it can be shown that the daily error of this chronograph will not exceed -3 to +2 seconds. The higher the accuracy of the movement, the more accurate the readings displayed by the pulsimeter, rangefinder and rangefinder.

Patek Philippe Multi-Scale Chronograph in platinum, limited to 150 pieces

Classic look, timeless beauty
Patek Philippe’s commemorative “multi-scale” chronograph reflects this Geneva watchmaker’s consistent pursuit of perfection, inheriting tradition and integrating innovation. The simple and elegant case, with beautifully designed layered lugs, is fixed to the outer edge of the case and the bezel in a low-key manner to play a fixing role. This design is slightly more complex but practical, ensuring that the case can be completely removed, simplifying decoration and repair procedures. The dial has three concentric dials, which represent the three functions of this multi-scale chronograph. Men’s watches are range finder, pulse meter and tachymeter from outside to inside. Women’s watches are arranged in the reverse order. Ref. 5975 men’s watches are limited to 400 pieces, made of 18K yellow, white, rose gold, and 100 pieces in platinum. Women’s watches feature long diamond hour markers and are limited to 150 pieces, including white and rose gold. All ‘multi-scale’ chronographs use hand-stitched crocodile leather straps and gold folding clasps, which are engraved with ‘PATEK PHILIPPE 1839-2014’, which complements the case.