"If your watch guy doesn't know that it's an eta or an eta clone, you probably ought to get a better watch guy!"
Maybe. Watch guys who work 'in the trenches' (fools like me for example) are far more likely to see an etaclone than a traditional old school watch mechanic. My 'watch guy' friend works on vintage RR grade PW, Vacheron, AP, LeCoultre, Longines, Omega, Gruen, rolex etc (rolex only if you are a friend or relative) and has never seen an etaclone but I told him about them. I doubt he has seen an eta 28xx for years except maybe in a Tooter, Mido Commander etc. (I threw in Mido Commander because I have one)
Many high line repair guys have probably never seen an etaclone, A7750 or Asian 21 jewel.
Lucky them.