"The extra yellow and white chips I have remaining do show slight wear albeit they are better than the previously known examples."

Not sure if this is in my article but will account for the extra wear.

The previously known examples were found in a toy box belonging to the family's two small grandchildren. they "harvested" them off the roulette table in Grandma's living room, pictured in my article.

Could be the youngest "Harvesters" ever.