If life was so easy. Even with a gasket there's always a chance of a crystal cracking particularly sapphire as they tend to be more brittle. I've just finished restoring an old Bucherer. It didn't have a gasket and as with many old vintage watches didn't have any water resistance to speak of. I just popped a new crystal in without a gasket and had no issues. Even if it falls out again, you've only lost a few pounds? Increments go up in one hundreds 0.01. So why not buy a couple of crystals oversized of each .start of with the smaller if it goes in but has any movement go to the next size up. If they crack, so what, there only a couple of quid each. If you get one in ok forget the sapphire, at least you have a watch that can be used. A designer watch I normally associate as a cheap bit of "bleep" with a cheap movement in. Your watch is a classy micro brand. Sent from my SM-T585 using Tapatalk