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Everything posted by RWB

  1. For rare pieces, one coin represents a significant portion of the known population. For common pieces, 1,000 examples might be a trivial quantity. Thus, piece-count errors in the TPG populations are of very limited utility.
  2. To be clear - an "authentication event" occurs when a TPG receives a coin, medal or other object. This is the raw count of items submitted. Following submission, several actions occur which separate damaged, defective, counterfeit and other ungradeable or limited-grading, from graded coins.
  3. I don't recall there being any guess is as good as another on this point. The reports for the last few years are bloated with cumulative authentication events and nearly useless for my purposes.
  4. Both "coins" are counterfeits. The first made from copy dies, the latter from false dies.
  5. Empirical data and anecdotes were treated separately as is consistent with their information quality.
  6. Well, I can add one more positive comment -- according to archive sources employees of the Coining Department claimed clad was easier to work than 900 fine silver-copper. It certainly took much less work to strike coins - there was no melting, rolling or annealing involved. Just cut out the cookies and stamp with a smiley face.
  7. Usable undated dies normally remain in use across calendar year changes. This approach has been in place, with small differences, for 150+ years.
  8. Not quite. Models were built and tested against data and did not involve use of any earlier guesses or estimates. Comparisons with previous estimates - published and private - occurred only after the model results were complete. Also, TPG populations were lower reliability data than some other sources; they also had to be adjusted for resubmission and crossover events whose ratios changed over time. In effect, TPG population data decreases in reliability and validity as one approaches the present. It is like starting with thick, rich bean soup, then adding water hour after hour. Eventuall
  9. Cladking's comment (above) is incorrect. Also, explosive bonding was tested, not adopted. See the book Pattern and Experimental Pieces of WW-II for details.
  10. Sooooo....ask someone with more experience than you before you submit the coin. Take you time. Go to a coin show once they open up and show the coin to several dealers. Most will be helpful.
  11. Is this index meaningful? Is it reliable? Test-Retest Reliability Internal Consistency Inter-rater Reliability 2. Is it valid? Face Validity Content Validity Criterion Validity Discriminant Validity 3. What published evidence supports the index?
  12. The population estimates are the product of a simulation model built on multiple variables including: pieces destroyed from multiple sources, statistical validation and adjustment of TPG populations, behavioral patterns (such as tracing extant specimens; appearance ratios) and adjustments recommended by several academic people who regularly deal with population estimates (and validation of estimate) from incomplete data sets. Available hard data was/is always the starting point, and the model then expanded and adjusted to accommodate the gaps. A clear example occurs in the 1930s dates where we
  13. If you want to preserve the coins for personal sentiment, consider buying high quality coin capsules from Wizard Coin Supply or other coin supply sellers. These will protect the coins from damage, and as well from tarnish, as the TPG holders. "Coin-tain" or similar capsules will cost a few cents each compared to $25 to $35 for "grading" from a TPG. With no present need for authentication or grading, why waste the money?
  14. For purposes of this thread, it is "value." The usual answer is "classic commemoratives;" at least that's what I've seen in posts for the past 20-years.
  15. Just curious --- what is an "underrated" coin? Popularity? Cost? Availability? Design?
  16. The explanation ATS seems to be that it is a software bug (not a 17-year cicada) not related to content. Maybe if you try again it will post.
  17. The pandas seem to be happy where they are. Why not allow them some dignity and not rip them from their homes?
  18. Did you examine the coin closely to see if the lines are complete? If they are broken or interrupted, you can save your money.
  19. The cows will come home wagging their tails behind them.
  20. Most coins found in small estates, likely such as your Indian cents, are not worth the expense of professional independent authentication and grading. Common Indian cents are worth less than a dollar each, if not damaged. To justify authentication costs, a coin should be worth a minimum of $150 to $200 wholesale. "Registry Sets" are collections of coins that have been graded by a third party grader (TPG). The owners compete with each other for having the most complete sets containing the highest quality coins. Some people get carried away by the competition and pay outrageous prices for
  21. That's a good place for them; but, add a note about them being counterfeits and where/when you bought them.
  22. This is in the "Book of Fractions." it originally came after the "Book of Numbers," but was removed during the First Council of Nicaea [pronounced: Ne ky 'a] (325 CE). when none of the Bishops could separate "numerator" from "deuteronomy" and they agreed to call the whole thing off.