My understanding is- 1) "regular" Levi's sold at different regions are made by countries (often developing countries) in those regions such is that I often find made in Philippines and Thailand Levi's in Asia; 2) the 501 STF model is made in Mexico mostly and therefore available in Americas but not usually available in other regions. One can of course find parallel imports or try to order online. 3) Levi's has revamped their line and a lot of the models got discontinued e.g. I bought a pair of rigid/STF made in Mexico Light Brown 501 a few years back at a parallel import store. I can't find them anymore even at the Levi's US website. Also gone are the 505 and 517 rigid models. Some of those have been placed under the LVC like the 1965 505 and the 70s 517 as seasonal models.