Cheap as chips, this one. When I first started tinkering with mending/servicing watches, my second step (after buying a job lot of Chinese movements on eBay) was to buy a margarine tub of old watches from a local auction. There were about 20 in the tub - 3 quartz, one with 1 jewel, 6 various ladies watches and an assortment of old gents ones.
From this tub, I have serviced/mended the movements of half a dozen or so, just for practice and this includes movements down to 5'" in size. I have 2 1940s Movados in the project box and this small (by today's standards) Lanco powered by a 1022 movement which may be ETA or AS. As the whole tub cost me £100 including buyers premium, it works out that this cost £6, and something else from the tub has also helped out another forum member.