Coin grades consist of broad categories designated by letters, and within each of those there are finer subcategories indicated by numbers. "F" stands for "Fine", a grade meaning moderate wear. Within the F grade there are 8 numeric levels ranging from 12 to 19. Thus an F12 is the lowest grade a coin can have within the Fine category and an F19 is the highest. A coin that's more worn than F12 falls into the VG (Very Good) or lower category, and a coin that's better than F19 becomes VF (Very Fine) or higher.
It would depend on the denomination of the coin and the condition it was in.
The value of a 1879 1 rupee Indian coin depends on its condition. This coin in excellent condition is valued between 24.99 and 39.99 as of 2014.
A Proof coin is a particular issue of a coin not a grade of condition.
10 centsMore:This 1938 Mercury Dime is made out of silver so as of 10/2010, the value of silver content is about $1.70 ($24.30 per ounce of silver). The numismatic value of the coin depends on where it was minted and what condition the coin is in. It was minted in Philadelphia, Denver and San Francisco. According to USA Coin Book, these are the values: Philadelphia (no mint mark): In Good condition, this coin is worth about $1.80 up to about $15 in MS60 mint condition. In MS65 brilliant uncirculated condition, this coin is worth roughly $30. Proof coins were also minted here and are worth about $525.Denver (small "D" mint mark): In Good condition, this coin is worth about $1.95 up to about $25 in MS60 mint condition. In MS65 brilliant uncirculated condition, this coin is worth roughly $35.San Francisco (small "S" mint mark): In Good condition, this coin is worth about $1.80 up to about $28 in MS60 mint condition. In MS65 brilliant uncirculated condition, this coin is worth roughly $38.
You possess a Coronet Head $10 Eagle - a 1892 gold coin in fine condition (F12) is worth: $525.00.
You must have a rare Shield 2 cent coin - a 1865 coin in good condition (G4) is worth: $16.00. fine condition (F12) is worth: $24.00 very fine condition (VF20) is worth: $28.00
You possess a Coronet Head $5 Half Eagle. A 1905 coin in fine condition (F12) is worth: $250.
A 1906-D Coronet Head $10 Eagle gold coin in fine condition (F12) is worth: $ 525.00.
You possess a Coronet Head $5 Half Eagle - a 1872 coin in fine condition (F12) is worth: $ 400.00.
You have a Coronet Head $5 Half eagle coin - if this specific 1906 coin is in fine condition (F12), it is worth: $ 250.00
You possess a Coronet Head $5 Half Eagle - a 1872 coin in fine condition (F12) is worth: $ 400.00.
You possess a Coronet Head $5 Half Eagle coin - if this coin was minted in 1897 and it is in fine condition (F12), its value is: $250.
Wow! You have a fairly rare coin in your possession - a Silver 3 Cent piece, minted in the year of 1867, in fine condition (F12) is worth: $500.00.The US Treasury also minted in the year of 1867 a Copper-Nickel 3 Cent piece - if this is the coin you possess, its value in fine condition (F12) is: $25.00.
You have in your possession a 1897 Coronet Head $5 Half Eagle - if this coin is in fine condition (F12), its value is: $250.
A 1887 Morgan Silver Dollar in fine condition (F12) is worth: $23.00. In a mint state of MS60, the value rises to: $40.00
A 1904 $5 Gold Coin - aka - Coronet Head Half Eagle - is worth in fine condition (F12): $250; if its mint state is MS60, the value rises to: $400.