black rubber sliver stranded t&e

[emphasis303]

Hi guys

black rubber sliver stranded t&e

when was the earliest these were being used looks to me lik 4mm as its really thick or could just be 2.5

thanks

 

[ricicle]

Those strands are tinned copper.I am sure it was first used in the late forties or early fifties

 

[RF Lighting]

AFAIK, it was sometime in the 1950s