I've been nerding out collecting the final pieces for my JMP50 build.
Does anyone know what Marshall used circa 1968 for the nine pin sockets in their JMP50s?
From the gut shots I've seen, they're almost always white in colour, so I'm thinking ceramic or bakelite maybe? (Surely Marshall were too cheap to splurge on anything as extravagant as ceramics???)

If anyone has any information to share on this it would be much appreciated.
Thanks in advance!