Thanks all for the info on this.
Here are some before & after shots.
I still need the correct era snare bridge so the search begins..
Gonna play it this week at some City of SD Summer concert gigs I have.
I'm going to do a sound comparison to a Supra-phonic.
This drum is really heavy as well.
Did Rogers make a COB Dynasonic?
I guess I better do some reading up on this!