No antique dealer will be able to give any details surrounding bayonets as recent as M7s. Blades from WW2 perhaps and earlier too maybe. The real experts are out there and thanks to the WWW I have been able to glean much info on blades and helmets.How could I date a M7 Bayonet without the use of an antiques dealer? Any ideas?
As a military instructor, I can only tell you that you were using poor technique.I broke 3 M7s in basic training during bayonet training.