This is the 14Q38, the Navy And Coast Guard Basic Utility Knife. Camillus continued making them after WW2 until the 60s, possibly the 70s. What makes it unique is that the Navy requested the pen blade instead of the awl. I think this makes it more of a jackknife. I have purchased a few of them recently for next to nothing. The only problem is that Foster Grant plastic called Fosterene, shrinks and cracks. I'm currently looking to get mine re handled. They are built like a tank. I fell into this rabbit hole by accident. I have since purchased three of them. And a Pal Blade Co version with plastic covers. I have been able to date this one to 1941-42 when they changed the name of the company to Pal Cutlery Co. And...I bought a version made by Boker USA, the 9631. Boker and Camillus also made the 9631 for John Primble Belknap Hardware. I've seen Utica/Kutmaster, Imperial, Hammer Brand and Craftsman branded examples. I know this is from a long time ago. But if I don't write it down, even I'll forget!