The one on the right looks all original.
The one on the left, id like to see closer photos of the dial to say if it has been repainted at some stage.
But both look authentic (but to be 100%, photos of the interior are needed).
Re service, DONT use omega. They will replace/alter all sorts of parts and risks destroying its sentimental (and cash) value. A good independent watchmaker should be able to repair them for (depending on condition $200-$400 each.
On value, givrn the Seamaster isnt running, its prob worth around $500. Once repaired, just under $1k. The gold one, a lot depends on the gold content.
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