Posted By:
Brian GoldnerTo the best of my knowledge, I've never seen one Leon.
Though such an item lies outside of my primary area of interest, i've seen a wide variety of material over the past few decades, but never one of these.
For that matter, the cards are difficult enough.
Years ago, i heard that Burdick didn't even complete this set, with one or more holes in his collection, filled with a corresponding D-359.
BTW, that certainly is a beautiful example that you have.
My compliments.