so never buy a AEK II that looks too used (if it’s yellowed, it was probably used a lot, if it’s still white someone stored it away.)
If some Mac item is yellowed, that's merely evidence it was exposed to light, and possibly heat. UV light (sunlight, old fluorescent) would accelerate yellowing. And of course in this case, the keyboard case may not be original to the keyboard PC board; or have been "retrobrited" which I never do. Other visual evidence may support use or other conditions, like "dirt" as described. I leave that evidence for discussion by more serious students of keyboards. So: is there a test whereby I can tap on some AEK II keyboard and tell someone "for X reasons I conclude this decades-old white keyboard was lightly used?" Or the converse, "for X reasons I conclude this keyboard is too worn for daily use)? I doubt impressions can be factualized; so I would not likely make such statements myself. I think this is still near-topic; still old keyboards in play. It's a thing! Google says so! ;) Herb -- Herbert R. Johnson, New Jersey in the USA http://www.retrotechnology.com OR .net