I've got every watch I've ever had bar two I think. Frustratingly, the very first one, which was a gift for being a page boy at my Dads wedding age 6 or so (Timex IIRC) and a Casio I lost on a school trip.
Tell a lie... also lost a Casio with the reverse display drunk on a beach. It was about 3am, decided to go into the sea, took the watch off and put it on my jumper. Got out of the sea, picked up my jumper... bollocks. Managed to track another down, and would love to find the other two, but not sure I'd even recognise them now.