In the last 6 times I have taken my Fisher F5 out, I have dug a 925 ring--each time. Totlot searching and the F5 are made for each other !!!!
Here is a pic of the 6 rings with the Fishe F5 VDI number--all dug from woodchips each one, at a different location
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Some of these ring up the same numbers as a new Zinc penny on the F5--- 59-60.