Wow, I hadn't recollected the evolution in that way Paul. And now, considering you are amongst the primeire reknowned experts on vintage detectors, I am honored to have had any impact
It's a bummer that there's not more interest in the subject of vintage detectors. Even those that were detecting in those days (60s/70s) don't really have much time for any sort of collecting, documenting, comparing, etc.... Contrast that to those who are into motorcycles, cars, etc... who go HOG WILD collecting, showing, writing about, etc... their vintage cars, bikes, etc... But md'ing is such a niche geeky hobby already to begin with. So not too many people take notice as to "how far we've come". I've loved reading your posts, seeing your pix, etc...
I too once started a vintage collections. Got a few from gold-hart Dan (that had been passed down to him from a guy who'd dealt detectors since the 1970s, that had been taken in on trades). And snatched any up I saw at flea markets, etc... Unfortunately during the storms of '97'-98, the industrial shop building where I had them stored, developed a leak in the roof. Water came in and dribbled down onto the exact shelf I had several of the units stored. Ruined and rusted them, before I realized what had happened. So that ended my aspirations of thinking I was going to start a "vintage detector museum" Doh! Glad you took better care of your stuff