yes Jamie, if a stovebolt isn't dripping oil it must be empty
commonly folks keep a drip tray on the garage floor under the engine area
some dripping from the draft tube is common from oil vapors and water condensing, but also there should be some shreddy metal mesh filter material in the can part that can get saturated after 50 years, and flushing it with solvent would be good - some of the old manuals suggest burning them clean, although that will mostly destroy the mesh
Bill
