I think the deciding factor on the Plank was the Factory 30, apparently someone placed a higher value on that.
150 Series are tough enough with the PSA pop report showing fourteen 350 Series cards and only three 150 Series, all Fact. 30. Oddly no Fact 25's are shown in the pop report. With a total of sixty-four Plank Sweet Caporal's graded forty-seven were graded prior to listing the series/factory, leaving the true factory rarities still to be determined. Researching the PSA Auction prices realized for the unlabeled Planks revealed eighteen of the unlabled forty-seven, all of which were either 350 series or 150 Fact. 30, with only one 150 Fact. 25, which might lead one to believe the Fact 25, is actually the scarcest of all possible backs on the T206 Plank(less the Piedmont). Reading old archives 10+ years old, many people were uncertain the Fact. 25 even existed.
Regardless, the 150's are still much rarer and more desirable.
Last edited by sb1; 07-20-2019 at 08:48 AM.
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