Vintage Slide Ruler Fredrick Post 1447 Made in Japan Original Box Engineer
$ 11.87
Description
Vintage Slide Ruler Fredrick Post 1447 Japan Original Box. This vintage slide ruler comes in its original cardboard case. It is marked Japan and everything seems to work as it should. There is one small area with black markings on it. I think likely it is permanent marker. Please see the pictures for the full description.
