Hello, I am seriously debating wether or not to buy this Omega Genéve Crosshair Dial 18ct gold watch from 1968, and I can't really get my head around how much I should pay for it. I really like the looks of it and the fact that it is gold. But it has a new crown and new glass becuase of prior service. It also has a mark on the case by 9'oclock, but the pictures won't really show it. It is 34 mm, and the ref. nr. is 131.019. It is listed at $770. How much is this watch worth? Is it worth the $770 from just the 18ct gold inside, or how much is it worth if not? Thank you guys