This is the same as an Extract from the Archives from Patek. It does not guarantee authenticity. Only a Patek "Certificate of Origin", that is originally issued with the watch, guarantees a authenticity.The last one I ordered from Patek was for my Patek #5024G and cost $125.US However it definitely helped when I sold my last Patek ;-( I understand that Vacheron will issue a new Certificate of Origin for their vintages pieces. I've been told this requires you to send them the watch for service with a request for this certificate. I was also told this takes a minimum of 6 months and, depending on service requirements, $2,500.US
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