Windsor Diamond?? Pale green ashtrays or coasters. No ribs in bottom for glass to sit on, no separate cigarette rests in edge, but really doesnot need them, so I can’t say for sure coaster or ashtray. Also cannot positively identify them as Windsor Diamond, but they sure look to be. They each measure right on 4” diameter, and all are in excellent condition. I have 3 and will be happy to discount a bit if you want them all...