I found this case with some of my great grandpas stuff http://imgur.com/a/V3CS5. It may have belong to his father who was in the merchant marine during World War 1. Or it could be something to do with hat making or fixing. Either way it would be cool to know what it is.
p.s. if this this the wrong subreddit for this I'm sorry
Your question seems better suited for /r/WhatIsThisThing.
I see, R to L, a drafting pen in a handle, a second pen point, a plotting compass, a ruler, and I don't know what (removable handle for the compass?).
This might have been used for plotting course & location on charts.