Depends. The ETA-2824 is a fairly common movement with inexpensive Chinese clones, so dials and hands are reasonably cheap and common. If the target case also

Depends. The ETA-2824 is a fairly common movement with inexpensive Chinese clones, so dials and hands are reasonably cheap and common. If the target case also uses the same ETA movement then it’s simple: Unscrew the back, remove the crown stem, drop the movement. Assembly is the reverse of removal. Where it gets tricky is if the target doesn’t use the same movement. In that case, I’d just buy an AliExpress watch with the same dial size and an ETA clone movement. Otherwise you have to ensure your target is the correct size and you’ll probably need to 3D print a movement holder.