70s - Vantage I, Vantage II, nylon, Blue Star, or natural gut (lots of different brandings) - my favorite was PDP Rough Gut
80s - Prince Synthetic Gut (no Duraflex yet) the above, lots of "graphite infused" strings, natural gut & kevlar
90s - same as 80s, poly, natural gut, lots of choice in gauge
00s - lots of choice in manufacturer (everybody found out that .50 worth of synthetic string could be sold for $15)
I remember using uncoated gut during the late 70's and 80's. I miss those strings. Thanks for the flashback Rabbit.