Asking for help Japanese Straight

Bogie

I'm not looking at you !
I have two Japanese straight razors. One is a vintage Eiko blade on which I have a good history. However I have no information on this blade. If anyone can offer some information on its history it would be greatly appreciated. It was a bit difficult to get a good edge on it as the steel seemed quite hard. However, it now shaves like butter.
 

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