Just a note to anyone new or new-ish to refurbishing any vintage item from someone who scrapes a living from it
It might seem either obvious or superfluous but the time and heartache you will save by being totally anal over putting each type of screw/component in a separate little plastic cup (of the disposable type) or zip close bag and labeling it (write on a bit of masking tape and stick to bag).
Photograph every stage of the disassembly no matter HOW simple and obvious it looks at the time.
And finally the one that separates the pro's from the armatures - cut card panels and masking tape them in place to protect wood veneers / perspex panels etc and do all your re-finishing of wood / perspex etc when it is separated from the electronics and use a thick wool blanket to rest the item on on your workbench to protect it.
Always use the same side "UP" for the blanket and buy the best quality masking tape you can from an auto refinishing supplies.
Buy good quality small steel, brass and nylon "Wire Brushes" - they are the most useful things after the screwdriver!