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They were oiled, wrapped in cellophane, then wrapped in paper. No oxidation, but the oil is now grease. Nothing a quick dunk in alcohol or soapy water won't fix. I've used one before.

Just to add;...

razorbladesandmore.com has the Feather single edge that might work.

The problem is that the same model of Valet razor has different tab locations, so you could end up with a combo that won't match...