Today I bought the lightest coin ever I had in my coin collecting era. Alluminium 1 Franc Francaise Date: 1947 Portrait: Morlon 51.562.000 copies 74.2 ko Only and here is a photo of it:
1860 silver 3 cent .75 grams same for 1861. Jim M the type 1 is .8 grams. Type 2 n 3 are .75 g. According to the redbook. PS. I'm "in a house" in the same state as U, maybe you could teach me about treasure hunting (lots of old farms around here).
Probably the one you pictured, though I do have a small Netherlands coin that may be slightly lighter.