Is that printed on the back of the cardstock?
The back should have the white coated side showing.
Or is it on some different cardboard?
Very cool printing error. I've never seen one printed on the wrong sides, but have seen an ad for a handful of 72s that were like that. The price was way too much at the time.
Printed on other cardstock could happen if there was a protector sheet as part of how the cardstock was packaged and it got used. I have a postcard back that's on packing material. It's the only one of those I've seen.
Steve B
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