what ar ethe letters and numbers following a rare coin used for?

Question

when buyinbg a rare coin there are numbers and or letters following the actual coin example 1910 eagle quater dollar g-4

Answer 1

Grading standards...

PO-1 = Poor
AG-3 = Almost good
G-4 = Good
VG-8 = Very good
F-12 = Fine
EF-40 = Extremely fine
AU-50 = Almost uncirculated
MS-60 = Mint state uncirculated
MS-65 = Gem uncirculated
MS-70 = Perfect

PF-63 = Choice Proof
PF-70 = Perfect Proof

For your 1910 quarter in G-4 means...
Date and letters plain. LIBERTY obliterated.
Making it worth at most $2.50.

Each coin is graded differently.

Answer 2

The g refers to the grade good, which is actually bad. The grades, (from bottom to top), read poor, about good, good, very good, fine very fine, extra fine, about uncirculated, uncirculated. The 4 refers to the numerical equivalency of the named grade, (on a scale of 1-70). So you can see 4 out of 70 is very low. If buying a rare coin for investment, I would never buy such a low grade unless the coin is very rare and the "key" to a series. If buying to complete your collection, I guess its fine, but you should always try to buy the best grade you can afford. Trust me, you forget what you pay for a coin, but always appreciate a better specimen.

Answer 3

Most likely, these numbers are used for grading coins. Hopefully, the link below will help you.

http://www.acoin.com/grading.htm