Posted By:
Scot Reader
Ted,
Your "Sovereign 150-only" list includes most of the more difficult subjects from the 150/350 series. My suspicion is that these subjects not only were not printed with Sovereign 350 but were also either not printed or short printed with the other 350 backs. My survey data indicate that 350 backs account for 26% of all backs seen on 150/350 subjects. Limited printing of these subjects with 350 backs thus may account for their relative difficulty.
Scot