These are amazing. So glad I was able to get a pair with so much design on both dies, including a full date and mintmark. 1968 seems to be the most common year, as reportedly somebody picked up dozens of old dies, collars, and other Mint equipment from the San Francisco Mint at a salvage yard or something like that. Thank you @Fred Weinberg . They will be well taken care of and properly displayed proudly. ~Joe C.
Those are two of the nicest looking dies I've ever seen. And the detail on them. With that much detail you can make your own errors. LOL
Your cancelled die pair will be a super nice companion with any error coin in an educational exhibit.