M7 Bayonet Question

[Voldemort]

For those that know, how can you tell a M7 that is truly Vietnam era? Many makers over the years and some span several decades, lots of sellers claiming Vietnam vintage but ya know......
Oh and going prices for a real one.
Thanks in advance.

 

[Bradsknives]

U.S. & Foreign M5 and M6 Bayonets; and U.S. M7 Bayonets

As far as the going price....go to EBay and check the "completed" (ones that actually sold) listings for M7 bayonets. Average out the sold price for 3 to 4 and that will give you a good idea.

 

[Hkindiana]

Humes M7_02 This is the best reference that I have found on Vietnam M7's