Revolutionary War era clasp knife

[urbanspaceman]

Hey Jim, I have to tell you about the Marlin Spike:
first the fish was named after the tool and not vice-versa.
Second, Marlin is a contraction of Marling.
Marling is the term for rope work, as rope was made from Marl.
Obviously a mandatory tool shipboard.
On a similar note, I recently sold a WW2 German SAK handled trench knife (see pic) that featured a canvas and leather stitching tool which I found curious as I've not seen examples of soldiers repairing such materials, but then I've led a sheltered life.
The other feature was a cork screw: convivial imbibing round the night fire perhaps.