I’ve been doing some preliminary research into silencer designs prior to filing my first Form 1, and ran across this article about a small lathe made by a British POW being held in a WW2 Japanese prison camp. Link to ~1.1 meg PDF.
This lathe was quite a bit smaller than the modern Chinese lathes made by Sieg and Real Bull, and which are commonly derided as toys. Yet, the author of the article made good use of it, fabricating parts for artificial limbs, among other things.
There’s something to be said for picking up and learning how to use a lathe as part of your preps. It could come in useful in the event of an economic depression when manufactured items become hard to get and it’s a tool with which to earn some extra cash.