amanico[JLC Moderator]
401467
I can answer on point 2 and 3. There are high chances your strap is not water resistant. And as for the moon phase accuracy, that means that...
It means that, in 122 years, if your watch is continuously running, the moon will be too fast or too slow by one day... Which is theoretical, since nobody lets his watch continuously run for such a long time.
Hence the limited interest of such an accuracy for the moon phase, in everyday's life.
Best,
Nicolas