WTF are you so arrogant as to imagine that your grandkid wants your crappy $500 watch from the early 20th century? Would you be thrilled that your grandfather is giving you bowler hat from 1935, or handing on his very fashionable hip flask? How about his totally rocking turtle-shell glasses from 1950?
The number of people who fetishize this stuff is very very small, dude. The rest of us accept that
- tools do their job, or they're worthless AND
- fashion, by design, decays to become unfashionable.
There is no intrinsic magic in a watch that makes it somehow different from every other human artifact in desirability or longevity.
And don't change the issue to a higher end watch like a $300,000 model. The honest truth is that your grandson would much rather you buy a lifetime of Apple watches, a new one every year, then give him $250K in cash when you die, than that you hand on to him some crazy expensive Patek Philippe...