Question about set registry
Mark
Posts: 3,550 ✭✭✭✭✭
Quite likely this question has been answered before but I missed it. Anyway, I apologize in advance if I did, indeed, miss the question and answer.
When I look at sets in the set registry, I now see 4 columns of population data: 1) "PCGS No. Pop," "PCGS No. Pop Higher," "Total Pop," and "Total Pop Higher." What is the difference between "PCGS No. Pop" and "Total Pop"? Ditto between "PCGS No. Pop Higher" and "Total Pop Higher"?
Thanks very much!
When I look at sets in the set registry, I now see 4 columns of population data: 1) "PCGS No. Pop," "PCGS No. Pop Higher," "Total Pop," and "Total Pop Higher." What is the difference between "PCGS No. Pop" and "Total Pop"? Ditto between "PCGS No. Pop Higher" and "Total Pop Higher"?
Thanks very much!
Mark
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Comments
<< <i>What is the difference between "PCGS No. Pop" and "Total Pop"? >>
PCGS No. Pop is for your label regular, first strike, etc.
Total Pop is for all coins that can be entered into your particular set.
Thanks. So wouldn't this mean that the "Total Pop" must be larger than the "PCGS No. Pop"? I look at my commemorative set--available in yosclimber's link below
Thanks again in advance!
This is particularly important for type sets, where more than coin can be used. You might have an MS65 1925-S Peace dollar (finest known) in your 20th century type set, but plenty of higher-graded coins in other dates could have been used.
Correct me if I'm wrong.
A set may have a top pop for a rare variety, but it might not be a top pop for the whole issue.
http://www.pcgs.com/setregistry/publishedset.aspx?s=511&ac=1
Bridgeport example:
9279 1936 Bridgeport 50C MS65 1700 830 1698 829
Maybe the columns were not updated at the same time?
The current Bridgeport MS65 population number is 1700.
So my guess is that the "Total" column (1698) is updated less often.
This would work if 2 new MS65s and 1 new MS65+ or higher was graded since the last time the Total column was updated.
However, the story would get more complicated to explain why the Total column is larger sometimes! (Somebody turning in a cracked label? Does that happen much?)
Thanks for correcting the link.
PCGS No. Pop = number in that grade in the base to which it is assigned
PCGS No. Pop Higher = number of higher graded coins in the base assigned
Total Pop = number in that grade for all bases and subsets for that coin's year
Total Pop higher = number of higher graded coins for all bases and subsets
If you want more info and can stand the punishment then continue reading.
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Some background is important. I'll use an 1808 capped bust half dollar as an example and the Everyman registry where 58+ is the highest possible grade.
The 1808 has two major types. The overdate 1808/7 and the non overdate 1808. The former is PCGS coin# 6091. The latter is coin# 6090.
The 1808 non-overdate has 16 die marriages and die states. Each has a unique coin# that is a subset of 6090.
- If you submit an 1808 non-overdate for grading but not for die marriage attribution it gets added to the total number of 1808's. It also gets added to the "base" (non-attributed). The "base" tracks all coins with that coin# but NOT varieties and die marriages.
- If you submit an 1808 non-overdate and want the die marriage cited on the cert it gets assigned a subset PCGS coin# and added to the total number of 1808's, and also to the die marriage count. It does NOT get added to the "base" count. So, for example an 1808 O.102 is a subset of 6090 and called/labelled coin# 39362.
The 1808/7 has just one die marriage.
- If you submit it for grading but not for die marriage attribution (why would you? there's only one!) it is added to the total number of 1808/7's. It is added to the 1808/7 base.
- If you submit it and ask for O.101 on the cert label it gets assigned as PCGS coin# 39378, a subset of 6091. It is added to the total number of 1808/7's, the total number of other attributed O.101's but NOT the base.
All of this is tracked by grade, obviously. If you have an AU58 in your registry it reports about AU58 totals. An AU58+ is a higher grade.
So TOTAL = ALL BASES + ALL SUBSET COINS
For 1808 AU58's coins
1808 coin# 6090: 52 base + 10 die marriages & recognized die states = 62 total
1808/7 coin#6091: 14 base + 1 die marriage = 16 total
An AU58 non-attributed CBH therefore looks like this in the Everyman registry:
PCGS No. Pop = 52
PCGS No. Pop Higher = 1 (there's one 58+ out there counted in the base)
Total Pop = 78 (62 + 16)
Total Pop higher = 2 (there's another 58+ with a die marriage attribution)
Lance.
But it does not explain why the Total Pop is lower than the PCGS No. Pop for Bridgeport.
That should never happen even for varieties.
And Bridgeport has no varieties.
Lance.
For the Bridgeport, 50% is going in the opposite direction which makes me believe there may be error in the logic, as it is again half, but in the opposite direction.
Could be the decrease represents a cert received from a crackout that lowers the total population, however the number graded still remains the same, as that is how pcgs computes their metrics; or maybe a grade guarantee that was downgraded (unlikely).
That could account for the total higher by 4, if the Total includes PR.
I'm not sure if PR qualify for this Circulation Strike Registry Set, and if all PR are considered equal to MS66.
Could be some code that hasn't been checked; maybe nobody noticed this before.
I don't see PL for Isabella in the online Pop. Did you mean PR?
I think I agree that "a bug" is the simplest and best explanation.
My speculation on what created the bug may be valueless.
It is good to know how the "Total" is supposed to work for registry entries which have varieties.
PCGS might be wise to suppress the "Total" columns for sets that do not have varieties, especially if bugs affect the display.