I found this strange/odd about SGC's registry

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Posted By: Rob D.

Apologies in advance if the following isn't that unusual. I'm not really a "registry collector," but I've entered a few sets on SGC's just for the heck of it, so it's quite possible I don't "get" all the nuances of a registry.

Before today, I had entered 28 of the 30 cards of the 1933 Butter Cream set on the registry. The tale of the tape looked like this:

Average grade: 40.00

Average weighted score: 39.01

Set superiority: 33.78

Today I got card No. 29 -- a Lloyd Waner graded "Authentic" -- back from SGC and entered it. The new tale of the tape:

Average grade: 38.62

Average weighted score: 37.43

Set superiority: 33.78

I totally understand why the average grade and average weighted score dropped after the addition of a card graded only "Authentic." But the fact that the set superiority stayed the same is puzzling to me. The way I interpret that is, based on the formula, the "superiority" of the set is no different from having 28 cards or having 29 with one being graded authentic. That doesn't seem right to me, because I would think that a set with 29 cards -- even if one doesn't have a numerical grade -- is "superior" to a set with 28 cards.

It could be that I'm not correctly comprehending what "Set superiority" is supposed to convey. And, honestly, it doesn't bother me because I was thrilled to add the Waner. Again, it just seems a little odd.

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Posted By: Matt

does "set superiority" have anything to do with your set compared to the competition?

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Posted By: Alan U

Here's the definition:

Set Superiority - The ratio of all your card grades in a particular set (taking into account the SGC Power Rating assigned for the cards that you have in the set) divided by the SGC Power Rating for all the cards in the set

-Alan

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Posted By: Rob D.

Matt,

I kind of doubt it, because I have another set registered, and it's the only one for that issue. So in that case, there is nothing to compare it to.

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Posted By: Rob D.

Hi Alan,

I saw that on the SGC site. I guess I get the definition. I still think it's odd that the formula considers 28 cards the same -- in terms of "superiority" -- as 29 cards with one being authentic.

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Posted By: Alan U

My only guess then would be that an Authentic card receives zero value, therefore decreasing you averages. A zero would not change the numerator in your Set Superiority calculation so it would stay the same, since the denominator is fixed based on the all the cards in the set.

PSA scores Authentic cards as a value of 1, but I'm not sure about SGC.

-Alan

edited for spelling

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Posted By: Richard

SGC Registry aside, if I read this correctly, then you've completed your Butter Cream set less Babe Ruth -- which I believe was your goal. That's no small feat, so I also believe a 'congratulations' is in order...

Congratulations!

Regards,

Richard.

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Posted By: Rob D.

Thanks, Richard.

The Butter Creams were my first attempt at putting together a vintage set in about 15 years, and it was a satisfying experience. Thanks to a lot of help from folks on this board, I was able to complete the set (sans Ruth) in about a year-and-a-half.

All in all, lots of fun.

Thanks again for the kind words.

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Posted By: Matt

Congrats Rob! That's no small accomplishment.

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Posted By: James Gallo

What value did they assign the card 0 or .5. All authentics should be a .5 but often are listed as 0. That would explain the difference.

James G

Looking for 1915 Cracker Jacks and 1909-11 American Caramel E90-1.

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Posted By: Rob D.

Thanks, James.

It's funny you mention that, because later last night I noticed that the value assigned is 0, yet in another set I have registered, an authentic card has a value of 5.

I e-mailed SGC with that very question and am awaiting a response.

Thanks for the input.

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Posted By: MikeU

It should be valued as a 5/0.5 i.e. lower than a 10/1. Should be a simple error for them to fix.