Early Wrench for M16

[Terry N.]

I have one of the first wrenches pictured; been using it for a L-O-N-G time; never seen one of the earlier style wrenches, though.

Information

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[Bill Ricca]

Referring to that early version.

I suspect it is either Colt or a Depot made tool. I have never seen an FSN, Drawing Number, or listing in a TM of that style.

It would be nice to find out the origin. Is there a marking I can research?