Help me date this

[Dr.g0nz0]

My grandfather past recently and i found this in a box of his army stuff. I know he was in the the Korean war.y

 

[Inazone]

Could be an Imperial Hunter as shown in this thread:

http://www.bladeforums.com/forums/showthread.php/539152-Schrade-Walden-H15

Similar but not quite identical:

http://www.bladeforums.com/forums/showthread.php/386519-Schrade-Walden-H-15

A few other Google searches mention a few different beginning and ending years of production, but all start in the early/mid `50s.