A PF-70 coin means that the coin is proof (it is a coin that has not been circulated and it has a mirror like shiny finish on it) and that its rating is 70 out of 70 because you grade coins on a scale of 0-70. If you have a PF-70 coin that means that it's perfect, so you should not spend it!
The designation "PF" for any coin means it's a Proof coin. Proof coins are given a grade from PF60 to PF70.
The value of this coin ranges from $860 in MS60 to $1310 in MS70. This coin was also struck in proof and its value ranges from $890 in PF60 to $1910 in PF70.
You can't unless you pay the $20+ to send your coin to NGC/PCGs even under magnification the ordinary person cannot tell the difference between a pf69 and pf70 coin. Of course, it is easy to tell if your coin is uncirculated or proof, a proof silver eagle will have very shiny, mirror like fields that are easy to see yourself in. An uncirculated silver eagle will be shiny, but won't be mirror like. Also, the raised part of the coin will look frosted on a proof coin but not on an uncirculated coin.
It's the highest possible grade for a Proof coin. The mnemonic "PF" identifies the general category of Proof-grade coins, and within that there are finer numeric gradations ranging from 60 to 70. Almost no coins grade to PF70 because it's the best of the best, with no blemishes or nicks, and a sharply-defined strike all over.
PF indicates a proof strike, which differs from a standard business strike.
Without more detail on the coin, it is hard to say what the value is. You need to know whether it is a business strike coin or a proof coin. You need to know the mint mark. A 1963 Franklin will have no mint mark or a D mint mark. You need to determine whether the coin would be considered to have Full Bell Lines (the 7 lines at the bottom of the Liberty Bell on the reverse side of the coin). Finally, you need to know the grade or approximate grade of the coin. Coins are graded on a scale of 0 to 70 with 70 being perfect. Coins are classified into mint state coins (coins that were minted to be put into circulation) and proof coins (coins that were minted for collectors). A perfect mint state coin would be an MS70 and a perfect proof coin would be a PF70. PCGS, one of the most reputable third-party coin grading services, has never graded a Franklin half dollar an MS70 or a PF70. Not to say that the "perfect" Franklin half is not out there, it just has not yet been graded. A 1963 Franklin half that receives an MS65 grade by PCGS would be worth $50. If the 1963 Franklin half received a MS65 Full Bell Lines, it would be worth $1,400. A 1963 Frankin half that receives a grade of PF68 is worth about $80. Coins that are graded and "slabbed" by a reputable third-party coin grading service are going to be more valuable than raw, ungraded coins. Therefore, to get a true picture of what your coin is worth, you need to find out a little about grading and determine the condition or grade of the coin.
Issued as a commemorative coin the 2004 Lewis and Clark silver dollar is valued in uncirculated and proof grades as shown in the following list: Uncirculated grades......2004-P MS63.............................$24 MS64.............................$25 MS65.............................$26 MS66.............................$27 MS67.............................$29 MS68.............................$30 MS69.............................$46 MS70.............................$375 Proof GradesPF63..............................$30 PF64..............................$31 PF65..............................$32 PF66..............................$33 PF67..............................$34 PF68..............................$35 PF69..............................$48 PF70..............................$560
The value of a coin depends on many factors, one is the condition, or grade, of the coin. Another factor than can effect the value of the coin is the mint mark on the coin. A 1983 Kennedy Half Dollar has one of three mintmarks - D, S or no mint mark. If the coin has no mint mark on it, it was manufactured in Philadelphia. If it has an S mint mark, it is a proof coin and was minted in San Fransisco. The D mint mark is for the mint in Denver. A 1984 P or D mint mark Kennedy Half in somewhat good, circulated condition is worth about $1. A 1984P in a high mint state condition is worth approximately $120. A 1984D in a high mint state condition is worth about $180. A 1984S can be worth up to $200 in perfect of PF70 condition. Most 25 year old coins that have been in circulation will usually receive a grade of VF20 or so. If this is the case with your coin, its worth about $1.
July 25, 2009 In 1982 the San Francisco mint produced 4,894,044 silver George Washington 250th Anniversary Commemorative coins. This was the first 90% silver coin struck by the US Mint since 1964. The value for this coin in various proof grades is shown in the chart below. Proof Grades........1982-S PF63.......................$8 PF64.......................$9 PF65.......................$10 PF66.......................$11 PF67.......................$12 PF68.......................$14 PF69.......................$29 PF70.......................$250
August 9, 2009 The US Mint in San Francisco struck 4,265,234 proof Eisenhower Dollars in 1971. The values for this coin are shown in the following list: Proof Grades..............1971-S PF 63............................$7 PF64.............................$9 PF65.............................$13 PF66.............................$15 PF67.............................$20 PF68.............................$30 PF69.............................$50 PF70.............................$13,000
No. It is a British coin.
You can buy them at coin dealers and coin shows.