Anyone ever seen one like this before? This is not a Joseph Rodgers and sons. It is a Sheffield though. But look at the blade, it is hollowed on only one side. Is this a medical instrument or is it a razor? If the latter, how should I hone it? A layer of tape and go at it? I' couldn't find anthing similar in this forum or in the SR database. Appreciate any help I can get on this one.