Like the Green Valley post I did earlier today, Midas Metals are also thought to be commemorative pieces from the silver rich area of Elko County, Nevada. The Midas property was acquired by Hecla Mining in 2018. Here is a link for reference. https://www.hecla-mining.com/midas/
These have become harder to come by and prices continue to rise on them when they come up for auction.
Vintage Silver Bars 