[GreenKeys] Wiring inside a 19 table - copper or aluminum?

[E.]

…from what I read, there are several types of wire used - type af solid (asbestos), type rf and brown telephone wire.  I’m assuming that most, if not all, is copper???

The table I’m looking at is the same as this wiring diagram here:

http://www.navy-radio.com/manuals/tty/tty28-S-22c.jpg

A few wires need rewiring, due to some modification - don’t want any metal mismatches in there ;p .  Thx ^^ !