Posted By:
Scot
Hi Ted,
As you know, Kleinow (Boston) and Smith (Both), while available only with 460 backs (and assorted backs that appear in the 460 series), do not share a common back set with the 460-only subjects. For example, these two subjects are not possible with the Sovereign 460 or Sweet Cap 460/30 backs that are found on all "true" 460-only subjects. Kleinow (Boston) and Smith (Both) were more likely printed exclusively during the 460 part of the 350/460 RP print run, as they share a common 460 back set with most 350/460 RP subjects.
Accordingly, to support your 12-cards-in-a-row theory, you may want to look for two other "true" 460-only subjects with the Piedmont 42 back. I seem to recall one collector who indicated on the PSA registry a few years back that he owned Oldring (Batting) with Piedmont 42--so that may be one of the two.
Scot