Spark plug Wire

[STAN WHITE]

I have some Spark plug Wire , On the Wire it say 7mm Spark plug Cable. When I removed the insulation the wire strains looks to be Silver. As I remember 60 Years ago I thought the Strains were Copper. I might be wrong just thought someone might know. I will put it under a Microsope in the morning to see if it is Plated. Thanks for any info. PS Back in the day 50s I recall using Packard 440 Wire if I remember correctly. Thanks Stan