Just a utility knife...

[amecks]

but it is the heaviest, thickest utility knife I've ever used.  Over 6" long, not including the blade, and 3/4" thick.  It had three blades in it when I bought it at the pawn shop ($1.50).  The only markings are - the cast in blade shape towards the front, the star grip design and the back side has MADE IN USA.

[geneg]

Several years ago, I had some Lutz utility knives.  They were usually orange or yellow & very similar to the one pictured.  I'll try to locate one to see if they are brand marked.

[geneg]

Never mind!  Found mine & one on Amazon & they are marked.  It is still a heavier knife than most Stanleys.