How to Get a Date Off a Dateless Standing Liberty Quarter

MSDS reports were suggested , but not required until 1983. A lot of cleaning, sterilizing, flammable. absorbed , etc. I think most of the dangerous ones, such as cyanide can dissolve iron, copper, gold, and silver during mining of such , or cleaning coins. A few coin people have died from its use ( but it cleans coins well I guess). Several gold mining companies use it in my county.

 

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