I still have my E6B from 1973, the one that has the scroll knobs. Was going to give it to my much younger flying friend when he got his PPL but he said, I can't take that, it's an antique, you need to hang on to it. Little does he know, he will get it as a keep sake when I pass on. LOL. Now days, for the kind of flying I do, my ipad and ForeFlight are plenty !
Bob