The dice card mold was designed by Bud Jones in 1971. The mold resided at the Burt Co in Maine where the actual chips were made.
Spragg's info on when the chips were shipped is from the Burt records.

"However the catalogues support this theory'
They will be changed for the next editions.

You knew from the 1st sale you were putting out false information.
You knew you were ripping off your customers.