A bit late, but I would look into enabling debug Examine through the cfg options...
Code:
[ClientUserInterface]
debugExamine=1
Then in-game just examine an object and in the main chat window it should give you the object's OID, among other useful stats.
To get rid of it, you'll have to change the 1 to 0 AND delete your machine options iff in your client, dunno why it persists even after you switch it off.