Grandfathers Multi-tool

My mother's father was an engineer, with a degree in refrigeration from M.I.T. (he got his bachelors degree way back when refrigeration was the "next big thing"). He had lots of interesting tools in his workshop, but one of the older ones was this multi-tool. The wood handle is hollowed, with a threaded cap, and it holds several small bits including an awl, a phillips and a flat-head screwdriver, and a gouge.