US Airways Dividend Miles (Pre-FlightFund Merger) - Vintage Inflight Services Coupon Book

Long long ago (late 80s) I flew USAir frequently and purchased the booklets of ten Inflight Services Coupon Books. I've got five coupons left. They state "May be exchanged for One Mixed Drink, Wine or Beer or One Headset Rental."

Can we still buy these coupon books? I presume my five old coupons are still good for those items. Are they good for anything else?

I've found them in some of the clubs . . . they weren't aware that they still had them. I've never had a problem with them being honored.

since they have the old logo, it may be worth more to a collector on ebay than the actual drinks are worth