It refers to the purity of silver. In the United States, when some coins were still made of silver, they were 90% silver with 10% copper.
If that is a private mint coin, it is probably the weight of the coin.
A coin layered in .999 pure silver means that the coin's surface has been covered with a layer of silver that is 99.9% pure. This is often done to give the coin a silver appearance and can increase the coin's value for collectors or investors.
Anonymous
You need to give the denomination and date of the coin. Also where you see the 77 at on the coin.
the silver content in the coin is equal to or greater than999 fine silver
The hole was used to tie a string in order to recover the coin once the coin was used in a vending machine .
This is the designers initial.
I means that is a coin made of 92.5% pure silver.
Denarius, which is the Latin word meaning "coin, money, or a Roman silver coin".
Though name meaning depend mostly on the characters used to spell them. From what I gather, Ginza means "Silver Coin" or "Silver Coin Mint"
The US issued no silver coins of any type in 1979, but if you mean a 1979 SBA dollar coin, just spend it.
If you mean a American Silver Eagle bullion coin dated 2005? Yes, there is.