Some say it's boring to maintain value. In other words, is there a wristwatch with a premium for the future? Such watches(スーパーコピー時計), which are still highly regarded over the years, have a common value-increasing accelerator.
That is the "brand". A rare piece that is a first-class brand product that has been recognized by the public for its value, has a complicated mechanism as mentioned above, and is produced in small numbers, but if it goes on the market for some reason over the years, it will be at an unexpected price. Is not uncommon. So where are those brands?
I can't say everything, but there are brands that have been verified. The aforementioned Antiquorum has held special auctions focusing on one brand for all lots only a few times over the past 20 years. Not a few pieces have been confirmed to have increased in price over the years, as mentioned above, in those brands.
The brands are Patek Philippe, Breguet, Rolex, Cartier Cartier, Bulgari Bvlgari, Vacheron Constantin and Omega Omega (in order of year, except for the art-rated swatches).
Of course, this is not all, but it is the brand that actually produced the results. Finally, there remains the question of who will evaluate the value of the item 100 years from now.