3 Answers

Here is all I could find on it;

http://www.tanzer.bz/en/products/zetec-74.html

http://www.tanzer.bz/download/produkte_zetec.pdf?lightbox

I truly appreciate the vision and creativity Porsche Design link and IWC came up with link for this Compass watch in 1978, a time when most companies were focused on large cases and multi-colored watches. Just from a watch design standpoint, it's stoic and zeroes in on functionality with an all-black link PVD finish on a super-light aluminum case and bracelet (which only weighs 70 grams). Altogether, it was a fresh use of unexpected materials and finishing at the time.

Actually to be fair as link per the ISO format Rolex tests its dive watches to 125 percent of the stated water resistance. So your link Submariner says it's good link to 300 meters but Rolex tested it to 375 meters.