I acquired a small group of carbine parts and tools. Amongst the goodies were three plain face push safeties. Can anybody help me determine if they are real, commercial, or fake from the following description? I also bought another one before I had any idea of what I was looking at. I include it as well. I am planning to trade these for other needed carbine parts and don't want to mislead anybody. I won't turn loose of them unless the authenticity is clear. The notch depth measurements might be a couple of thousandths off because of the difficulty in aligning the mic - they could be either slightly low or high.

#1) Shiny blue/black finish, .693" long; .308" wide.; square notch is .258" wide, .153" deep Has slight dimples on both faces (mold casting marks?)

#2) Black park, .700" long; .311" wide; square notch is .253" wide, .146" deep.
#3) Black park, .704" long; .311" wide; square notch is .251" wide, .133" deep
#4) Black park, .700" long; .311" wide; square notch is .255" wide, .158" deep.

Thanks.
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