I think I have my first Stagg EUB more than 10 years ago, later one with the enhanced headstock and a rosewood fingerboard (but without a bridge, it was cheap and I wanted the rosewood fingerboard for an older Stagg).
Just a few months ago I saw an even newer Stagg that was marketed under a different name and it had the same bridge as my old ones.
Maybe the metal inserts to the bridge just had the right diameter.
I got my Full Circle used without the inserts and used the old inserts from my brass adjusters. (BTW, all mm threads for me.)
The adjuster threads from the Stagg bridge are very thick.
A picture might be nice.