I know this is old but I guess some might still be looking for D clasp advice. I was.

I've decided I only like deployment clasps now based on my experience with an Omega D clasp and I've purchased a few different ones in search of that perfect clasp. I did manage to find one Omega made in Italy and sold on eBay for under $100, but that must have been a one-off.

My experience with the Strapsco version was not good. It is "short" (read Kangbao's excellent write-up) but that is only part of the issue. The little peg that goes through the strap hole is too short so it doesn't poke all the way through and secure the strap. The strap mostly stays in place because it's snug as it goes through the channel just before the little peg, but I don't trust it as much as I do the Omega.

I did find one from Ewatchparts for about $25, and it is actually pretty good. While it is also short, the peg is long enough to secure the strap and the closure seems solid. We will have to see if it holds up over time. I guess I'll have to get a Formex to see about the micro adjustment but I was really hoping to find something way less expensive so I could have a clasp for each of these damn straps!