I've finally found the right clock for me.
The Casio Edifice 527 could be a Breitling also in appearance. Total elegant ... totally sporty .... totally robust. One needs the clock never actually take off your wrist as they cope with any conditions, whether swimming, hiking, climbing or salt water ... no problem.
We recommend, however, that in saltwater abspühlt the clock after use with water, as otherwise nich can make absolutely beautiful spots.
Conclusion: if athletes, adventurers (that do not rely on a thermometer or level indicator) or businessman, the ideal device for the time specified.