Interesting. New code? As I said, the chip is rare. I've had a red, white and blue (never saw a yellow) in my personal collection for many years. The new ones I found happens to be exactly like the ones in my personal collection.

I don't have many whites. For the moment, I'll sell -- total price, delivered:
¶ a set of three for $26
¶ a red and blue for $15

Robt.