So I recently acquired a Underwood Master Typewriter with something interesting on the back.
Its a stamp, hard to really explain, it says "US Marine Corps Plant Account" followed with the numbers 187045 and on the bottom it says NAVMC 10235-SD. I have been searching the internet and have been unable to find any info on what this means or what it really is. If you guys have any info regarding what this is then I would love to hear it, thanks.