If anyone is interested, I have received several opinions on another site that this is indeed an authentic M39 bayonet. The bayonet is on its way......
Proud Canadian of Polish/Ukrainian ancestry, Chessie owner, CKUW programmer, milsurp collector, active Canadian Gun Nutz member, festival volunteer, bird & deer hunter, ex Canadian Reservist (Fort Garry Horse), son of a Polish 10th BK/10th Dragoons veteran, grandson of a WW1 Polish soldier, great grandson of a veteran of Emperor Franz Josef's Hussars.