Posted By:
Scot Reader
Ted,
Perhaps.
My thinking has always been that the six superprints were originally conceived as 350-only subjects (hence like 350-only subjects they appear with the AB350 WITH frame back), but due to their popularity these six were extended into the 460 series. When they decided on the extension, ATC didn't bother to reprint these six with the AB350 NO frame back that first appeared with the 350/460 regular print subjects. However, this still doesn't explain adequately in my mind why these six were not printed with the AB460 back--which appears on 350/460 RP subjects as well as 460-only subjects.
Scot