Two Portland-area casino chips, both illustrated in TheChipGuide.

The Green chip is from Vancouver, WA, a card room on Main Street that Opened in 1975, Closed in 1982. Same both sides and has no denomination.

ACO is Aero Club of Oregon, used in a social club in downtown Portland that opened in 1984 and closed just a few years ago. It was an association of private pilots in the Oregon area. The red chip is marked $1 on the reverse.

If these are of interest, I'll send you the pair for $10, shipping included in USA. I have two pair to sell. Personal PayPal is fine, as is your check if you are a Club member.