If you've spent any time shopping microbrand or attainable-luxury watches, you've run into this alphabet soup on nearly every product page: Miyota 9015, Sellita SW200, ETA 2824-2. Brands list the movement like it's a spec sheet flex — and it should be, because the movement is the single biggest factor in how a watch performs, ages, and holds up over years of wear. But most buyers have no real framework for what these differences mean in practice. Here's the inspection-level b