Be prepared to pay around $20K for a new movement. I've seen this happen before on a Nautilus. A new movement was needed. New movement cost almost as much as a new watch (retail price). Around 70% of the retail price if I recall correctly. I could be off - it was 10+ years ago. Yours will probably be a lower percentage of the new watch, the Nautilus was steel, yours is gold. Both steel and gold cased watches use the same movement and if only the movement is replaced, the costs should be similar.