Hamilton “Sutton” Advice?

I have my father-in-law’s Sutton. It has not been worn in more than thirty years (he died before I met him) until a few days ago when I took it out for a spin. It worked well. The biggest issue is that the second hand is no longer there. Secondly, it could use a good cleaning and maybe a new crystal. There are no cracks so maybe cleaning would suffice.

My question, is it worth restoring and if so, who does that?

thank you.