I picked up a slightly tatty, but generally intact Eros Mark II a few years ago, with a view to replacing pretty much everything except the body and neck. However, once I'd scraped off the filth and given it a very quick set-up, it seemed to play quite nicely. Pots were very scratchy and it had the weirdest fret buzz I had ever heard - a sort of fretless "mwah" noise, but just on three frets of the "D" string. A turn of the bridge height screw and bobs-yer-proverbial. A quick squirt of switch cleaner, followed by the dreary task of putting the thing back together (seriously... trying to put the pots back into a semi-acoustic is like trying to perform gynaecology through a letterbox) and it sounded way better than it has a right to. It took quite a bit of cleaning and there were some nasty, but shallow scratches to deal with. Out came the rubbing compound and some elbow grease and it looks the business. Well, I think so.
These things are hard to date, but the venerable Bassassassin reckons it's "early seventies" so that's good enough for me.