I think that 168 is 'chronometer certified' whereas a 166 is not (link).
Type: Posts; User: PickleB
I think that 168 is 'chronometer certified' whereas a 166 is not (link).
There are more pictures in another thread of Paul's (link) and I'm going to have a stab at the ref being 166.0032. If that is correct, then yes, there was a gold version, the BA 166.0032.
+1