Do you need the valuation for a sale or for insurance purposes?
Most of us here are watch collectors, not valuers, so our opinions will be different to the man in the street.
We focus on originality and anything that detracts from that reduces the value.
So a heavily polished case is undesirable, as is a blemished dial, both issues that this watch shows.
For an
insurance valuation you could take the value of the gold content, add a couple of hundred for the movement and then double that value.
For a
sale valuation you could check past sales on eBay for a guide, but as
@ConElPueblo noted, probably gold value plus a couple of hundred for the movement.
Note: to obtain a "gold value" you would need a watchmaker to remove the movement and crystal so that you are only weighing the gold case.
If the bracelet is also gold, that may help with the total value, but only being 14K, it won't be a fortune.