Grail alert, a new to me 94110

[studioal]

Thanks to anyone who responded to my last couple of threads asking for thoughts on prospective watches. Sharing your knowledge is incredibly helpful, kind and humbling. Anytime I come here I realize I don't know much. After not finding what I was looking for online, I ended up finding a local 94110, which in itself is a miracle. This one is from the original owner and has a 1980 serial. It's on a 9315 folded link and came as-is. I see some mid-case rust which I'll have my watchmaker deal with. I surrendered my '89 79090 plus some cash ($2750, full disclosure) for this in return. I think I did alright. It's amazing how the blue hues change in certain light. Sometimes the dial appears dark, sometimes light.

In terms of replacing the original tophat, what do you recommend? I'm a cyclops guy, but I am TrueDome curious.