Old Yale & Towne key blanks
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I have three of these wierd key blanks, I have no clue what they are, there is a guy that collects these around here (Yale and towne) and I was wondering if I should keep them or sell them, what are they worth, are they old? Give me some information please!!! They have a bent blade, one key has the identifier number as ( 6 Z C ) Crazy looking things!! I just bet some of you older guys know exactly what the heck these are!!