Hi Charles,
I don't know how old your dice might be, but we have a pair with the same logo (in silver). Like yours, they have "97" on the engine and the car and they don't show a city. Ours, however, are in great shape...sharp edges and a crisp, clean logo.

About 4-5 years ago we were at the Pass and tried to get dice, they told us they destroy the used ones . Hopefully they've changed that policy!