yeah, 30 years ago stainless spokes were kind of exotic. Most spokes were galvanized or chromed (the only chromed ones I have seen were Japanese). I don't know if the galvanized spokes were chro-mo.

Galvanized spokes actually lasted pretty well, but they did not necessarily stay pretty. When I started breaking spokes on one wheel not too long ago, I took a spoke to my LBS for them to match so I could relace the wheel. The galvanized spoke was so oxidized that they asked me if I wanted black spokes like that (galvanized) one.