Incorrect. All EB rims have the inner hubcap bead like his. As shown in post #10.
Oh no Mr great justino... We aren't talking about anything to do with the hubcap and the attachment. Where I'm from, the 'bead of the tire' or the 'bead of the rim', refers to the sealing surfaces where the two meet.
On '66 and '67 wheels there is no inner bead on the rim. They are like the 16.5 truck rims or big truck tires that do not have an inner bead. Of course, there's other differences like Okie4570 mentioned, but the two easiest ways to distinguish the difference in '66-67 wheels is the lack of the inner bead and the rear rim side taper to the wheel center.
To illustrate this, these are '66 16" wheels in the blast cabinet and then a picture of a '68 and later wheel. Also a word of caution about installing '66 hubcaps on non-'66 wheels. The ID is slightly different and the '66 hubcaps can easily come off the rim....
Anyway...sorry for the longwinded reply, but I had to clarify....