Mark, at our age(I am a bit older than you) we are retro--lol.
But there are some things I still use --not just because they are old--but because they still work well.
I have a few Blake and Lamb stoploss,that have to be older than me.I use them because they are still strong and work well.I do comment every time I make a catch in them--how well they still work.
I have a couple cork and wood decoys, that out perform anything made to day.
When you stop and think about it-- a lot of us older trappers--can still out perform a lot of the young bucks. Experience(old age) has a few benefits--but the older you get, the fewer they are.
As far as old zebcos go,I bet I have a bunch.A few old Johnson century's also.
Tom