[LJB]

I decided to do the glass replacement myself.  I removed the old glass and found what looked like old black rubber and don't know if it was originally a 'gasket' or if it was some type of adhesive.  I soaked the adhesive with alcohol and removed what I could see. 

I noticed the friction ring was held in place by indentations from the brass piece.  See picture.  I used a 1/16in drill bit and drilled out the indentations, but the ring still wouldn't move.  The drilled holes will not show once assembled.

I then soaked the space between the ring and the outer brass cover with alcohol and finally sprayed it with penetrating oil (PB Blaster) every hour for a few hours and let it sit overnight.  Next morning the ring slid off with a little pressure.

I haven't decided what I'm going to use to replace the old rubber.  RTV or rubber cement.  The ring fits tight, just need something to keep the glass solid.

I want to thank everyone for the help.  Gave me the courage to move forward on my own.