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I googled them a long time ago. There is a book or two on them and IIRC a forum where some people discuss living in the area of the company and working there.

I have a number of German razors with Kayser Ellison steel. Various manufacturers. Seems like that was a well thought of company back then.

It depends on the time period in which they were made. I have a few really old ones that are made with Kayser Ellison Steel, Pumamaster or Best Puma came later and I'm not sure of what order. I've...