1975 Paul Revere Medal

The American Revolution Bicentennial Administration (ARBA) medals, including the 1975 Paul Reverse medal, were struck in sterling silver (0.925 fine). The medals weigh 480 grains/1 ounce, so they contain 0.925 troy ounces of pure silver.

I believe the mintage of the silver Paul Revere medal was 227,058.

Hopefully, the following will answer your questions...

The ARBA series of commemorative medals began in 1972 and ended in 1976; a distinct design was used for each year. In 1972, only bronze medals were issued; from 1973 through 1976, bronze AND silver medals were issued.

The bronze medals were offered in two packaging options each year: 1) housed in a small plastic hinged case, and 2) in a philatelic-numismatic cover (PNC) which included a block of four Bicentennial stamps. The medals in the plastic cases are dated for the year of their issue; the medals in the PNCs are not dated.

The bronze medals in the plastic cases sold for $3.50; the medals in the PNCs sold for $5.00. In case you were wondering, the 1973 silver medals sold for $10 each; the price was raised to $15 each for the 1974 through 1976 issues.

All of the medals, bronze and silver, were struck at the Philadelphia Mint.