I have a 2" sct diagonal from celestron, marked simply "japan."
It has a fine spray of bubbles (?) in the coating, resembling dust on about 20% of the surface at one edge of the mirror; this is only visible when held up to a light at just the right angle, and it definitely does not affect 1.25 eyepieces; I doubt it would bother 2" eyepieces either, but I can't say positively. Anyway it gives far superior views to the stock 1.25 diagonals from meade and celestron in a direct comparison. Original caps and box.
Thanks. No adapter included, sorry.