That is the worst infestation of woodworm I have ever seen
A while back I purchased a Pye LV20 in very poor condition (mainly for the CRT).
The base of the cabinet crumbled away to dust, what was left had been hollowed out internally. One good stomp on the top of the cabinet, and it broke in to several pieces!
I disposed of it in my wood stove, I take no chances with it when it is this bad.
Amazingly the chassis was in great shape once properly cleaned, and will be saved for future use.
I bet you are pleased that the hardwood frame is unaffected and can be kept.
Mark