.
Welcome to the Forum!
That is a tough one. The scratch is wide nearly touching the writing on both ends, which during an attempted repair could complicate things even more.
Not an easy dial to find in the secondary market, with yellow gold indeces, but patience could pay eventually.
Here is a service dial that sold on Ebay last month:
https://www.ebay.com/itm/29592363502...Bk9SR6yNlcjQYw
I think the price is up there. Here is a list of other Ebay sold dials to give you an idea of condition and price:
https://www.ebay.com/sch/i.html?_nkw...Sold=1&_sop=15