I have an Invicta I bought when I worked a an old school jewelry store in my college days, which would be pre 2003. It's a Japanese Miyota 21 jewel automatic movement with a see through back. No numbers. Silver on silver on silver. Looks like a pro diver. But it predates the Invicta winged second hand. Looked just like a Tissot the store had, but a whole lot more affordable to a college student. The movement has become sluggish over the years, and the watch repair places won't consider working on it because it's a cheap brand (now). Does anyone know if I can refurb it to sapphire and a decent movement?