PRF likely refers to Proof or Proof-like coins. These are coins that have been struck using a special process to produce a mirror-finish obverse and a frosted reverse. The process involves using a specially prepared die and a higher pressure to create a more detailed and visually appealing coin.
Proof coins are typically minted in limited quantities and are often considered collectible items due to their higher quality and aesthetic appeal.
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Very fine condition
1907
If you mean U.S. coins, that would be 25 cents, 5 cents, and 5 cents.
It means, Double Die Reverse
Could be Pulse Repetition FrequencyActually it is a bit more mundane, it is PReFerred, as in the Preferred number. It replaces an entire list of previous prefix's to military numbers such as C for Connector, R for Resistor, W for Wire, etc.An example:MIL-PRF-27/356C succeeds MIL-T-27/356B and is the specification for:TRANSFORMERS AND INDUCTORS (AUDIO, POWER AND HIGH-POWER PULSE), INDUCTORS, POWER, TF5S04ZZ
The prf means the coin is a proof, proof coins are not intended for circulation and have mirror like fields (spaces where there is no design) and generally frosty designs. US coins are graded on a scale from 1-70 with 1 being barely readable and 70 being absolute perfection. Prf 65 is a fairly low grade for a US proof made recently. For older coins Prf 65-66 are typical due to damage from improper storage. But for newer proofs, prf 68 is low and 69 and 70s are common.
Performance, If it's mil-dtl, it's detail
Answer: PRF (Personnel Readiness File/Folder) files are used in technical application and are not likely to be accessed by your average PC user. In general, PRF files are Windows system files, although they have other technical applications as well.
1. PRF is based on population data as a whole, SRF is based on Sample data 2. We can draw only one PRF line from a given population. But we can Draw one SRF for one sample from that population. 3. PRF may exist only in our conception and imagination. 4. PRF curve or line is the locus of the conditional mean/ expectation of the independent variable Y for the fixed variable X in a sample data. SRF shows the estimated relation between dependent variable Y and explanatory variable X in a sample.
SGLI
Pulse Repetition Frequency.
you complete the pokedex for prf. rown and then he gives it to you. :)
What do you mean by "What is the new coins?"
I believe it is the highest quality for a coin, a prf-65 liberty nickel, for example, could auction for about $600CorrectionPR65 describes a specific grade of a specific type of coin. PR stands for Proof, which means that a coin is specially struck to give it (usually) a mirror-like finish, and is sold to collectors rather than used for spending. 65 is a numeric grade that further describes the coin's quality. Numeric grades for proof coins as well as for uncirculated coins (designated MS, or Mint State) normally run from 60 to 70. 60 is the lowest acceptable condition. Of course MS60 or PR60 are still very nice, but not as good as a higher value. In addition very few coins are so well-struck that they qualify for a grade of 66 or above. That means PR65 describes a coin that's (a) a proof strike and (b) almost but not quite the highest possible quality.
Platelet rich in fibrin (PRF) is known to have several advatages over platelet rich plasma PRP) including: 1-Unlike PRP, with PRF no anticoagulant or/and antiplatelet therapy is needed, hence diminishing risks for bleeding. 2-PRP is effective when used on soft tissue only, while PRF could be utelized in treatments plans for both soft and hard tissue. 3-PRF is prepared faster and easier, rendering PRP less time effective.
Coins on clubpenguin are money. You need coins to buy things.
Discovery Channel have an on line shop where a 4 DVD set is available for about 35 dollars http://store.discovery.com/?v=discovery_dvds-books&ecid=PRF-TV1-100001&pa=PRF-TV1-100001