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. That being said here is a list from Abravesfan and Jim R. that I just cut and pasted from another thread: (as for T205, go with Hindu being toughest and Drum being a bit easier but more valuable....the rest don't hold much of a premium)
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From Tim C (Abravesfan)-
The following list is the one Jim Rivera and I are currently working from. We have discussed at great length recently moving a few of the backs up or down the list but for now they remain put.
1 - Ty Cobb
2 - Old Mill (Southern Leagues) - Brown*
3 - Lenox - Brown
4 - Broad Leaf 460
5 - Drum 350
6 - Uzit
7 - Hindu - Red
8 - Lenox - Black
***Red Cross Type 1***
9 - Broad Leaf 350
10 - Blank Back*
***Coupon Type 1***
11 - Carolina Brights
12 - Piedmont 350-460 Factory No.42
13 - American Beauty 460
14 - Hindu - Brown
15 - American Beauty 350 (No Frame)
16 - Sovereign 460
17 - Cycle 460
18 - Tolstoi
19 - Sweet Caporal 350-460 Factory No.25
20 - El Principe De Gales
21 - American Beauty 350 (Frame)
22 - Sovereign 350 (Apple Green)
23 - Sweet Caporal 350-460 Factory No.42
24 - Cycle 350
25 - Old Mill (Southern Leagues) - Black
26 - Sovereign 150
27 - Sweet Caporal 150 Factory No.649 Overprint
28 - Sweet Caporal 350-460 Factory No.42 Overprint
29 - Old Mill (Base Ball Subjects)
30 - Polar Bear
31 - Sovereign 350 (Forest Green)
32 - Sweet Caporal 150 Factory No.25
33 - Sweet Caporal 350-460 Factory No.30
34 - Sweet Caporal 150 Factory No.30
35 - Piedmont 150 Factory No.25
36 - Piedmont 350-460 Factory No.25
37 - Sweet Caporal 350 Factory No.25
38 - Sweet Caporal 350 Factory No.30
39 - Piedmont 350 Factory No.25
This list is based solely on the overall scarcity of one back in relation to another. No emphasis or additional weight was placed on a particular subject or subset within a back group that is believed or perceived to be more difficult than the rest.
Each collector’s experience will be different and they may find that over a short period of time or with a given subject that their difficulty in acquiring different backs doesn’t exactly match this list.
Ty Cobb Tobacco
This back is controversial to say the least and many collectors do not feel it is a T206 while others believe it is. Compelling arguments have been made for both sides but neither have yet to produce sufficient evidence in our opinion to definitively show it is or isn’t part of the same set. Until that time it will remain on our list as it was originally classified as a T206.
Red Cross & Coupon Type 1
We don’t believe that either of these backs are part of the T206 set and haven’t included them on the current list for that reason. However many collectors do believe they are or possibly could be T206’s so we included them in this post, unnumbered, to show where we believe they would be ranked if included.
Old Mill (SL) – Brown & Blank Back
These two backs were not inserted into packs and both are essentially printers scrap. Some may not consider these necessary for a complete back run.
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