I have a Whites SL Classic III and it has a trigger switch, a black sand mode, and a frequency switch like some of the old Fishers, and it seems to be a 1280 clone. It handles salt beaches quite well with these options. If your Coin Classic has these features , it will likely do well on fresh and salt water beaches too. My Classic III does a fair job on BB size gold nuggets, about 8" on a clad quarter, and mine cost me $75.