These are oversize Paul-son chips with plain molds. Six chips, all 50000 denomination. I'm assuming these were samples of the big-chips they could make. Appear to be regular clay mold chips.

Yours for $4 each. Take all 6 for $24 and the Dansco page they are in is included if you ask. Shipping is $3 for any number of chips, including the other chip sizes also offered today.