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Hello There was a time when the Royal Oak models on the ground a model serial number was engraved, this means only the play of the series. This number is however nciht for identification documents. In these models would have to open the casing to the chassis serial number to see. However, to recomme

For all Audemars Piguet watches is a combination of 4 numbers Reference Number (not engraved) Case number (engraved) Caliber number engraved (Movement) Factory serial number engraved (Movement) this combination can be queried in the factory or in any service center so the clock can ever be determine

Hello, For all Audemars Piguet watches is a combination of 4 numbers Reference Number (not engraved) Case number (engraved) Caliber number engraved (Movement) Factory serial number engraved (Movement) this combination can be queried in the factory or in any service center so the clock can ever be de

Hello, this is a Audemars Piguet Kaliber 2003 extra flat.....best regards CH.

loooook: AP movement 2121 before restore ! best regards Ch.U.

before ! Ch.U.

Ch.U.

this R.O. com from 1974 and is restore in my atelier. I work for AP. Roal Oak Bj.1974 Serie A 561 best regards Ch.U.