My "Watch" Loupes
Here you find all the loupes that are in use in my watch household. I also have two watchmaker loupes that are "somewhere" and that I can not find at the moment. Sorry :-) Interestingly enough, my current watch loupes are not even real watch loupes, I am using a slide loupe as identified by Julien Josset, a watch friend from Paris, a children's loupe with a magnifying inset and the very small watch loupe integrated in the Wenger Watchmaker's Knife
For pure movement inspection (e.g. at the flea market), a 10x magnification is probably the most popular choice