Hi, I have a 1966 Panama 1/4 Balboa coin that I'm trying to identify. On Numista, it shows silver coins only went until 1962, but I see other 1966 coins for sale that appear to have "LEY" marking and seem to be silver.
My coin looks very sharp and bright (possibly proof), but I can't find any mintmark 'S' anywhere on it. Can anyone help me identify if this is silver content and whether it's a proof coin or regular strike?
Thanks for your help!





