In about 1975 or '76, a Jr. High chum got me into it. I was about 13 yrs. old, and would accompany him with his Compass 77b to the local elementary schools. I remember that a typical couple-of-hour hunt might net a few wheaties, a buffalo, and if it was a really good day, a merc or two. I was hooked! Turns out his older brother had a used Whites 66TR for sale, so I bought it for $100.
A 66 TR is a circa late '60s late '60s. So in 1975 or 76, it was still a fairly recent machine. However, those were the years that TR discriminators were just coming out. So pity the poor guys that still had all-metal TRs

We found our foil and tab ratio going through the roof, as the guys with discriminators were silver-mining the schools :P So I broke down and got a Garrett Groundhog (VLF/TR) in my high school years (late '70s). But AGAIN technology had some bad news for me, since those were the years that motion machines were coming out. We laughed when we saw guys swinging their coils like golf clubs, but stopped laughing when we saw what they were finding, and the depth they were getting. So I broke down in 1982 and got myself a motion machine: a Garrett ADS II. During the later '80s, I switched to Whites (Eagle, Spectrum, XLT, etc...), as they were getting better depth than their Garrett counterparts of those years.
Now am fully converted to Minelab, after seeing a user effortlessly point out an 8 or 9" deep turf silver signal, that I had to admit I could barely have heard.
Even though things were basically virgin back in the early years, I actually find more coins, and older coins now, since we're wiser on where to search, get deeper, understand beach storms, old-town demo's, etc.... Back then we didn't have much junk tolerance. If a site gave up some old junk and henry shells, for example, we'd leave for "greener grounds". Nowadays though, we gladly wade through old age-indicators & don't mind as much as 100 to 1 ratio. When you're finding the right stuff (pistol balls, green copper, toe-taps, harmonica reeds, buttons, etc...) it tells you a seated could be next
