Never heard of this one before untill I saw it in the back cover of the latest "Lost Treasure". The F4 and the F75. The F75 (75 years special edition) has a simple 1 knob and 1 button controls and an adjustable length arm cuff (how cool is that?), 2 digit target value, finger triger pin point, backlit display. Both come with a DD coil. The F4 seems simplistic in design. 11 segment, notch, 3 digit target value, thumb button pinpoint. Am I to believe that this is Fishers response to the Ace series and the Prizms? I can't find any information about these, not even on Fishers website. Anyone have more to add to this? Prices? Come on, fess up Tony!