1. Position of the Royal Oak balance spring

The balance spring of the Audemars Piguet Royal Oak series movements (except for the old models) is generally at seven o'clock on the front (four o'clock on the back) o'clock position), most fake watches on the market use "SMD" movements to make the appearance of the movement closer to the genuine movement. However, if you look closely, all the gears on the "board circuit" are for decoration and do not work.

2. Shock absorber

Genuine products use kif shock absorbers. The "Octopus" balance wheel is certified as a card-free shock absorber. The travel time accuracy is determined by the U on the balance wheel. The fake watch uses a triangular shock absorber (domestic shock absorber), there is no pendulum nail on the balance wheel, and there are speed adjustment piles on the balance plywood, which is called carding.

Popularity point: Generally, the self-produced movements of high-end watches adopt non-slip adjustment. The outer pile of the hairspring with a slip is easily impacted by external forces, causing displacement, thus affecting the accuracy of travel time. Extended information

All original watches, especially men's watches, must have many English letters printed on the back cover of the watch case, indicating the watch brand name, country of production, all steel or semi-steel waterproof, anti-magnetic, The name of the anti-shock or anti-vibration device (see the common English letter marks on the appearance of watches later), and is engraved with a trademark pattern specific to the watch brand. In addition, there are also some numbers engraved to indicate the movement number and case number of the watch. Most of the patterns and letters engraved on the back cover of counterfeit watches are very thick and blurry, and the case number and movement number are unknown.

Original watches generally have a film on the back cover, while plum blossom watches have a green plum blossom-shaped label on the back cover. Gold-plated case watches made in Switzerland have letters engraved on the open position of the case (opposite to the spring rod where the strap is installed), such as PLAQUEGI0, indicating that the case is 10 micron gold-plated. Counterfeit watches do not have this mark. Many counterfeit watches use processes such as titanium nitride to pretend to be gold-plated cases.