Next the optical barrel. It is heavy cast metal with a convex front surface mirror in the bottom.
A lot of hardware was missing in this set including some of the bolts that secure this to the cabinet. It's a miracle it wasn't damaged.
I discovered this hardware rolling around on the mirror! Doesn't appear to have harmed the mirror though.
I has a 4820A (AKA 5AXP4) upgraded CRT installed. I also picked up a NOS 5TP4 and the ETF