6"blue case - 1st coinage of the British Virgin Islands proof set 1973 with COA

Proof Sets (with Box & COA): These original sets (like those struck by the Franklin Mint) contain a sterling silver dollar with about .75 oz silver

The 1 to 50-cent coins were also issued in copper-nickel and bronze. Ungraded individual circulated or base-metal coins generally sell for $3 to $8 each