Some Data Regarding TPG Grading And Cracking/Resubmitting

I suspect that you may be correct in this. Unfortunately, because of crack-outs and resubmissions, it is not possible to distinguish this with respect to my original question without having genuine knowledge of the real numbers of coins submitted, regraded, and how many times they have been regraded. Unfortunately, this statistical data set would be nearly impossible to collect unless you have a lot of detailed contributions from submitters or you are wealthy enough to develop your own data set (or you are PCGS and take and compare photos of every coin)




Of course, didn't mean to imply otherwise

Since these were coins that you purchased a while ago I wonder if the grading standards shifted. It would make sense that a coin sent in/cracked out today would receive the same grade next week but coins cracked out a decade or so ago might have been subjected to slightly different grading standards. ProfLiz, how long between your purchase/crack out and recent submission?

I hope you start a ProfLiz 7070's thread.

The comment about the "old small size" ANACS slabs doesn't mean much unless the slab generations are identified. The small size ANACS slab was produced from 1989 to 2005, a period of 15 years that included 4 different owners and both conservative and lax grading periods.

Yikes! I didn't mind this thread for a day or two, and all of a sudden I have lots of questions to answer! Let me give it a shot:

basebal21 and CoinsKelly - I purchased most of these coins three or four years ago, and I did not notice any changes while they were stored in my album. The bright white coins stayed white, none of them developed album toning, etc. Although I was quite careful, I can't rule out the possibility of slight damage due to cracking and handling - but I got as many upgrades as downgrades, so there doesn't seem to be a trend either of improvement or damage.

Conder101 - Sorry, I did not realize there were such shifts in "old" ANACS, and I did not keep track of which generation slabs were represented here. There aren't enough to make any statistical generalizations from anyways.

Susuman - Copper and silver coins are both well-represented in my data set, and they performed similarly. Most of my gold coins were purchased raw, so I don't have enough statistics to tell if they have the same trends.

There were no trends with respect to value; I had high priced coins upgrade and downgrade about equally.

However, there was one clear trend: high MS coins were significantly more stable than circulated or low MS grades. Ignoring the ICG and the MS64--->genuine coins, of 7 MS64 and MS65 coins, one upgraded a single grade; one downgraded a single grade; and the rest regraded at the same level (even when crossing TPGs). This would seem to agree with your hypotheses and the discussion in this thread about the market force for consistency in high end coin grading.

I hope that is clear, but feel free to let me know if it's not!

If anyone does decide to start a regrade database, I will be glad to donate my data. As far as my 7070 type set goes... Well, once I finish photographing my Half Cents, we'll have to see... ;-)

solotime - Of three old, small white slab ANACS coins (which Conder101 points out could be from several generations), I had one upgrade, one downgrade, and one unchanged grade. Of two more recent blue label ANACS coins, one downgraded and the other got a details grade.

There is not enough data there to make any generalizations about ANACS coins of any type. I personally am sure that there are undergraded and overgraded coins in ANACS slabs, as there are in all the TPGs.

Whenever I send in Crossovers from NGC or ANACS to PCGS, I inform the previous TPG that their S/N should be removed from their archives since it was removed from their holder. So far, I have yet to have any replies either positive/negative.

Hmmm, wouldn't that mean higher populations => lower prices?

A gal can dream...