Kapton insulated cable perhaps?
I like Kapton, with the silver plate its likely to be Mil. spec and as such probably fairly old, I believe kapton (polyimide) insulation has been forbidden in Mil. wires for quite some time. When Swiss Air flight 111 went down near Nova Scotia (1998) the kapton wire flash over was suspected, but hey teflon insulated wire probably brought down TWA 800 (1996) but its one of my favorites
Modern avionic wire now often combines soft teflon polymer with a harder shell polymer like PEEK or tefzel but kapton is fine for amps etc. IMHO.