impaired Proof A Proof coin that grades less than PR-60; a circulated Proof. See also mishandled Proof.
incandescent light Direct light from a lamp, as opposed to indirect light such as that from a fluorescent bulb.
Impaired proof - A proof coin with wear or damage resulting from circulation or mishandling.
Inaugural medal - A medal issued by the official inaugural committee commemorating the inauguration of a U.S. president.
Impaired Proof
A Proof coin that grades less than PR-60; a circulated Proof.
Imperforate
Indicates stamps without perforations or separating holes. They usually are separated by scissors and collected in pairs.
Impaired Proof - A proof coin that has actual wear on the coin or other problems that would keep the coin from grading at least Proof 60.
impaired proof A proof coin with wear or damage resulting from circulation or other handling incuse The opposite of relief -- design elements are impressed into the surface Indian Peace Medals Medals presented to native Americans by ...
Impaired Proof - A proof which has been damaged either by careless handling or circulation.
impaired Proof
A Proof coin that that is no longer in a proof state, such as a circulated Proof.
incomplete strike ...
impaired Proof: a Proof coin that has been spent, cleaned, or otherwise damaged.
incandescent light: a normal light bulb, usually 75 Watts, used to grade coins.
IMPAIRED PROOF
A coin struck as a Proof but no longer in mint state, i.e., suffers; some form of marking, hairlines, etc. usually through mishandling and/or poor storage rather than necessarily through actual circulation use.
Impaired Proof
A Proof coin that grades lower than PR-60.
Also see: Mishandled Proof
Incomplete strike ...
Impaired Proof
A proof coin downgraded because of damage or signs of circulation wear. On the 70 point scale, an impaired proof should always rate less than 60.
Incuse ...
4. Mitchelson. Impaired Proof. Connecticut State Library.
5. PCGS PR-40. B&M "Morgan & Leckar" 11/1998:2157, $74,000 Verify that this is not the next coin.
6. James A. Stack. "Very Fine." Stack's "Stack" 10/1994:865, $66,000 ...
Lesser graded or damaged examples are described as impaired proofs. Brilliant UncirculatedAlso referred to as FDC (Fleur de Coin - flower of the die).
More importantly, the supposedly "impaired Proofs" just don't look like impaired Proofs.
If you are under the belief that the 1894 S Barber dime is a Proof coin, then the coins mentioned above should be listed as Impaired Proof 3 and Impaired Proof 4.
Budget Recommendations: Build a set 1864-1872 in G-4 to VG-8 grade. The rare 1873 can either be omitted, or you can purchase one in impaired Proof grade.
A term used for an imperfect proof is an' impaired proof'. This must be taken into consideration when purchasing these coins remembering that proof is a definition of strike and not a definition of wear nor a grade.
The “Proof' label was used to describe either an exceptional MS piece or an unimpaired proof issue. It wasn’t until much later that the term proof referred to the method of manufacture rather than some superlative adjective.
 See also: Coin, Grade, Proof, Struck, Strike
  
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