I’ll get measurements from mine tomorrow - but I think that if you want to replace the thicker ARF caseback, you’ll also have to remove the decorative rotor plate that ARF have added to make it look more like a 4130 movement (the ARF caseback is deeper in order to accommodate it).Hi do you have a measurement of this case back, the expensive one is thicker than stock by 1mm or so. Yes, just slightly thicker but I'm looking for something more affordable to replace ARF think case back lol. I don't mind solid or display, not that I will take it off put on table for ppl to see anyway.