Not familiar with an attribution to Tagus Ranch (EHT I think), but wonder - could they be a generic or advertising chip for T R King? They would have had plenty of small crown chips to practice on! Good finds and the mystery factor does not detract from that.

Hint for Jim Colbert and his We're Long Gone feature: Tagus Ranch is now Noe Pallets. They've got piles of pallets but still Noe Pallets.