From what i have had in the past, the 42mm ones all suffer from bad movements and a too deep case, i have never found a 42mm with eta only asian. The closest to the gen is the 39mm railmaster, the other 39mm ones all suffer from the wrong OMEGA (joined along the base of the letter as across the middle like the gen)
I had this one but sold it, it was 42mm but the faults were:
Case to deep and not brushed on the sides.
Bad crown
Cheep mineral glass
Bad lume
Omega should be joined in the middle of the font
Wrong logo
Wrong case back (solid)
Here is a 39mm gen, i know it is on an smp strap.
here was my group shot, im now down to just 3 my railmaster and the gen and rep with gold markers. You can read my review of the railmaster linked to bytor's post.
You will find that any that are advertised as having a 2892 actually have a seagull movement, mine works perfect dont be put off by this.
Andrew has a blue faced one with the correct omega wording but wrong case back and logo with asian works and it looks like the date wheel is to far to the left, he also has the one you are looking for with same floors, not sure about the blue, or the case depth.
PT has a nice 39mm with blue markers but wrong logo and omega but with ETA and if you are in the EU you could have it in a couple of days from him.
hope this helps.