Errr, I am not so sure the issued EZM2s had black bezels.
My recollection of the large batch sold through a German department store (after de-commissioning from GSG9 duty and being serviced by Sinn) was that they were all silver bezel ones. Every one of them.
The £1300 one on Ebay is a simple Hydro, silver bezel.
The £2500 is a GSG9 LE, but not "military" per se, just a limited edition.
And you could get Sinn to swap them for you at service.
So GSG9 dialled ones can have both bezels. So can Hydro-dialled ones.
But issued ones were all steel dialled
My EZM2 (see earlier in the thread - civilian, and with a black bezel) popped up on Chrono24 with bracelet and rubber, B & P, with about 4 years to end of battery, and under £1000, from a private seller in Holland. I only got it in April, I think. So they do crop up, but you have to be ready.
Dave
EDIT - on the Deskdivers site, there is a photo showng the group of 40 GSG9 issued ones, in service cases, ready for sale at Manufactum. All steel. Interestingly, if the GSG9 keep their UX's as long as they did their EZM2s, they will be up for sale soon...............