For those of you who have a watch with the OEM deployant clasp... what does the little pin hole right above the "OMEGA" letters do on the underside of the clasp? Can't seem to find an answer anywhere but it seems like you can push a pin into that hole...

 

It allows the cover to slide off to expose the clasp mechanism. Don’t do this as there are springs in there you don’t want to lose.

 

I think I read in a review of the Globemaster, that pressing this will give you a bad day.

Found it: https://omegaforums.net/threads/an-ownership-review-of-the-omega-globemaster-or-“the-idiot-button”.62685/

"If you are stupid (like me) and chose engineering as your career, you are probably the sort of person that will find such buttons irresistible. You have already figured out that if you push on the thing, you can slide the cover plate out of the way to reveal the mechanism underneath with the hope of gaining better access to the spring bar from the rear.

What you need to know however, is that as you gently slide that plate to one side an impossibly small spring is going to fly out, at about Mach 3, bounce off your head and disappear into the furthest flung corner of your home/office etc. The spring is of course a vital part of the clasp release pusher mechanism which will not work without it. If you are lucky enough to recover this little bugger, you can look forward to a long night trying to re-fit it. You will make this mistake only once. Be warned…do not push the IDIOT BUTTON!"

(found towards the end of the review)

 

yes. if not cautious, the spring will do exactly what c2500 said. However, the spring is cheap, only a buck and can usually be purchased at an OB as long as they are well stocked. Plus it really just takes less than 5 minutes to disassemble and reassemble. Super easy! Just take your time if you ever get curious and make sure you have good tweezers and a loupe.