This is ADAN from Madrid, Spain. Adan is a big G-Shock enthusiast and I know him far a very long time. One of his specialties is making Hydro-Gs.  Hydro G-Shocks are filled with silicon oil, which makes the watch extreme water resist (at least 1000m).  He has a website with a little shop called G-Stock.  He is also a key figure in Comando-G, the Spanish language G-Shock Forum on HdeR. He likes swimming a lot, in his swimming pool or in sea.