I just came from the
local guitar shop where they had a UV777BK for sale. Excellent price, I'm looking to put it on layaway and live a life of crime for the next 45 days.

)
Anyway, I checked it out, and it looked unmodified except for the chrome skull knobs. (Oh well) But the thing that surprised me was the trem bar, which was not 'pop-in' or screw-in, but it had a collar on it, like the bar for my old S470 with the TRS. The rest of the bridge looked good, nothing like the TRS7 (or whatever) on my RG4270.
What does this tell me? Is it old, new, swapped out for something else? Also, is there anything else I should be checking out on it before I buy?