Questions about deployant clasp

Hello
I am thinking about getting an omega deployant clasp but I have a few questions.
1) what is the reference number of the newest 18mm deployant clasp
2) I know you cant use any strap and the omega ones are really expensive. I found a few companies (mill handmade, delugs, and genteel) I am most leaning towards delugs because I Know the quality is great and genteel is twice as much. I'm having trouble with the measurements needed for my strap. From the genteel website is says the length I should get is 95/100 mm but I have also seen a lot of other measurements. My wrist is 190mm so if anybody can help with that it would be greatly appreciated.

Welcome. But first things first, its called a deployant clasp.

i cant help any further, but someone will be along soon to hlep you

Whoops didn't realize I posted it on the vintage thread just put it on the normal one thanks

I believe the Hirsch Voyager series is compatible but haven't confirmed this:

https://www.hirschstraps.com/collections/voyager

Need holes.

Edited to Voyager, thanks!