Help identifying a vintage SAK

[LookingLost]

Hello, I recently came into possession of what appears to be a vintage SAK Tinker it's in rough shape but I only paid $5 for it so I think it was a good buy. I'm looking for information to help date it. Based on my research its pre-1973 but other than that I don't know.

I'm not sure why the pictures didn't upload, but here's a link to the album with the pictures https://www.flickr.com/gp/visconti/cu29Fz

 

[JD Mandrell]

It's definitely an early one. The file on the back of the square Philips screwdriver, may put it 1950's