Excal 1000, Excal II, Sovereign GT, CZ-20, Tiger Shark, Tejon, GTI 1500, Surfmaster Pulse, CZ6a, DFX, AT PRO, Fisher 1235, Surf PI Pro, 1280-X, many more because I enjoy learning them. New Garrett Ca
I was curious about this when I started the hobby and borrowed one from a Army surplus store. Luck had it that it worked but it took awhile to figure out what it was trying to tell me. It wouldn't find a coin if you set it on top of the coil. Only larger items and mainly iron, not a sound on gold.