Ok, did some sleuthing around the internet for marked 6th or 7th series checklists. Found at least 2 instances where the 7th series was marked only to card 511. In order words cards 507-511 were filled in/check off. All other cards after that were unchecked. The other 7th had boxes checked from 512-576 but nothing in 507-511. (not all 512-576 were checked though).
If including 512-522 in the 7th series, does that account for a 66 7th series sheet including another 7th series checklist? From a yellow base point of view?
That would leave the 6th series as 447-511 or 65 cards with a duplicate checklist. The only problem there is the supposed sp's. in the 6th series.
billp
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