This Casio Edifice EF-546 was my first grown up watch and also the most expensive one I had ever owned. It's very special to me given the sentimental value it holds. :
Casio EFR-546D-1AVUEF | bol.com
OFFICIAL WARRANTY) Casio Edifice EFR-546D-1AV Chronograph 100M Black Dial Stainless Steel Bracelet Men's Watch