This one came as a request in another thread, so I am adding it here so I can easily find it again
Entry #4, 21Aug2022 - What is the toughest Off Back Set Possible?
So this question was posted in another thread: what would be the "toughest" set you could put together using only off backs (ie, no Piedmont/Sweet Caps)
This is something I have thought a lot about. I have an Excel file that has combined populations (PSA+SGC) for all 520 cards. I update it every 6 months or so. And I consistently look at those extremely low population cards with envy. So this was a perfect chance to dig deeper into the numbers and see what the toughest set would look like, if you wanted to put together a 520. This is going to be a LONG post with tons of huge graphics. Its the only way I know how to do it, so apologies in advance.
We will start as we normally do with caveats
* The PSA and SGC pop reports are problematic. In some cases, quite problematic. PSA has gone through a number of iterations with how they have cataloged cards in their pop report. Starting with just "T206", which is extremely unhelpful for a back collector, then eventually graduating to something like "T206 Piedmont" which is only slightly more helpful, and then eventually getting us to where we are now, which properly identifies the series and the factory (where needed)
* Where does it hurt the most for an exercise like this? For cards that overlap in different series. For example, if a card has a Sovereign 150 and a Sovereign 350 back, there are slabs out there from PSA that just say "T206" and some that say "T206 Sovereign" without a series designation. So getting exact counts is impossible.
* PSA has also misclassified certain cards (and I think it happens when that player has multiple poses), so there are absolute errors in the pop report that make you think there is a front/back combo that has a pop 1, when in fact, it is just an error. Not great.
* SGC has done a good job of cataloging cards by series/year, for instance, all Piedmont 150s get a 1909 Piedmont Cigarettes designation, which helps. That helps to solve the Sovereign issue, but unfortunately, they do not track factory numbers for SweetCaps, which is a huge problem. SGC also has cards misclassified. It happens, unfortunately.
* These counts only show graded copies, obviously. If you've been hanging around here long enough, you have seen a TON of very rare front/back combos posted in raw form. These aren't factored in. In some cases, these raw examples are snapped out of a PSA/SGC holder, which makes it all the more difficult to really know how rare a card is.
* When thinking about these cards, another thing to consider is "how likely is card X to get graded, compared to card Y?"....T206 collectors with a modest knowledge of the set understand that certain backs (Broad Leaf, Hindu, Uzit, etc) are very rare. When those cards are found, I think it is reasonable to assume that they get submitted for grading (and sometimes snapped right back out!) compared to, say, a Polar Bear. Of course, there are a lot of Polar Bears graded, a lot of plentiful Old Mills and Sovereigns too. I think those tend to tilt things both ways. A Black Lenox back may only be the 4th most populous for a front, but I think we can assume that a higher percentage of the Black Lenox's for that front have been graded, compared to say an American Beauty or EPDG (or especially a Piedmont/Sweet Cap)
Because we have 520 cards to look at data on, I am splitting this up by PRINT GROUP to make it slightly more manageable, and I think splitting it up by print group also lets us see a few cool patterns. Now that I've yammered on and on, lets start. I again used Scot Reader's scarcity rankings (
http://www.t206insider.com/store/c1/insider#checklists/) and so if there is a tie between 2 backs, the tougher back goes first. Obviously.
** one final note. You can only post a max of 18 images per post, so I have to split this into 2 posts **
** second note. I color coded the grids. It might look "busy" but I think it actually helps to spot patterns and it makes it easier to distinguish the backs instead of just walls of text **
*** final warning....if you aren't interested in looking at the card by card stuff, I put summaries after each chart by series, and you can always scroll to the bottom of the 2nd post a see a summary ***
PRINT GROUP 1 // 150 Only Subjects (no 350 Series Backs)
This should look pretty standard. For 8 of the 11 cards, the toughest back is going to be Brown Hindu, followed by Sovereign 150. These are the only 2 off backs available for these 11 cards
Toughest Back Summary:
Hindu Brown = 8
Sovereign 150 = 3
PRINT GROUP 1 // NO 150 Series Backs and limited 350 Series Backs
These 3 cards are all very well known and do not require a ton of explanation. The Old Mill is the toughest back of the 3 by a huge margin over the Sovereign 350. Elberfeld Washington Portrait has only the Old Mill back and it is more plentiful than the other 2. It is also very very expensive.
Toughest Back Summary:
Old Mill = 3
Print Group 1 // The rest
Toughest Back Summary:
Old Mill = 94
Sovereign 150 = 20
Hindu Brown = 18
EPDG = 10
Some of the population numbers on those Old Mills is just nuts. Good luck finding them.
Print Group 2 // 350 Only Series
I mean, too many cards to really dig in on here. I caught one notable error, I think it was SGC's pop report had Bender With Trees as having a Hindu Red back, which it obviously does not. If I missed any others, let me know.
Toughest Back Summary:
Drum = 85
Broad Leaf 350 = 60
Carolina Brights = 28
Tolstoi = 18
AB 350 With Frame = 5
Cycle 350 = 3
Polar Bear = 2
Sovereign 350 = 1
part 2 incoming...