I chose only from photographs, did not try on, I bought model 526 for myself and 510 for my father as a gift in the online store (they fit more under his big hand and look more harmonious), I wear it for 3 months every day, I don’t want to take it off even at night), the dial showed behaves very well when colliding with metal surfaces, there are no scratches left. The arrows and the stopwatch with the marks do not match a little, maybe the problem of my copy, but it doesn’t bother me, I really liked it for its price