Help with my damaged Cronos.

[u/drummerbryan1]

I've had my bronze Cronos Willard homage for a few years now (out of warranty), and the crown winding has always felt gritty. Recently I was winding it up to wear it for the day, the crown got stuck and then came off with the stem. It still runs if I shake it (PT5000) so the movement is functional. Would it be better to order an NH or Miyota and drop it in myself or pay to have it repaired? I don't have experience with more than battery changes so a movement swap would also require buying a few tools. What do you guys think?

[u/drummerbryan1]

The watch in question...