How can one tell if a watch has been tested according to ISO 6425 (dive spec) vs ISO 2281 (recreational spec). According to wikipedia the word divers denotes dive spec, and water resistant denotes recreational spec. However many watches omit any words from the dial and just state a depth, and some watches which are dive spec use the words water resistant, at least in the website descriptions, such as the omega 2231.50.00. I would have expected that if a watch was certified the manufacturer would see fit to brag about passing standards. So my questions are, is a list of tested watches maintained? is there something else that I should be looking for when looking at watches?