How can I tell a B&W 804D (series 1) from a 804D2

This is getting to be a mystery.

i've done google image searches an ALL the 804 Diamond look identical regardless of if they are labeled as a 804D or 804D2.

Since they ALL have the silver ring around the drivers, is it possible that there was not a D1 version of the 804 and the first version of the Diamond series for the 804 was a D2 ??

My shipping boxes don't say anything more than Diamond (mine are supposed to be 804D2's) and nothing on the speaker serial plate either.

If anyone out there knows about this , that would be awesome.