Awesome. Figured it must be an oddball. Just wasn't sure how odd.
Thanks for helping me to track it down. Not particularly valuable in this condition, but not nothing!
In case anyone's morbidly curious, I picked it up on eBay, along with a 1969 Mays Transogram Complete Box, for $299 with a BIN.
https://www.ebay.com/itm/186426419063
Obviously a pretty good price for these pieces.