They are obviously modelled after a WWII torpedo, weigh almost an ounce, and are about 4.5 inches long. The brass propellers spin, they still have pencil lead
and work well. They have absolutely no identification, manufacturer’s marks or
numbers anywhere on them. They are unbelievably sturdy, massively machined from solid brass components and chrome plated.
Obviously, they are uncommon but there are also a substantial number of them around (eBay), and they are all made with the same with interchangeable parts. That leads me to believe that there must have been some sort of a commercial production source somewhere at one time as opposed to a half dozen produced by a single bored machinist during WWII. The fact that they are completely un-marked makes me wonder if there was some wartime production (maybe a torpedo manufacturer) enterprise that made a bunch of them specifically for their employees.
Well, I don’t know anything about this pencil but offered to post something on my blog to see if anyone out there does know about them.