Then I think it's exactly the opposite. A vintage watch like the 2526 would not be expected to carry an original certificate of origin, and an archive would be generally acceptable. With a modern piece like the 5110 there really is a penalty for not retaining the original certificate. Watch collectors in 2016 require it, and the standard has been set going forward.
2,889 Patek Philippe listings are live on the eBay market and 1722 collector listings on the WatchProSite marketplace.

