By the way, the stigma seems to military acceptance
on handle, no?

Military knives with Serial No. is quite difficult to buy.

I found only 2, same as yours ^^

http://www.ebay.com/itm/291545397936
http://www.ebay.com/itm/291786768791


By design and purpose reminds German Kampfmesser (Kampf=Fighting
, Messer=Knife) put into service in 1968.
http://www.kotte-zeller.de/BW-Kampfmesser.htm?websale8=kotte-zeller-shop&pi=2364&ci=009855

There was an option for the German counterpart Commandos
with reduced hilt (1 pic)

and standart variant with single hilt (2 pic)