An Omega restoration will be very expensive, likely north of C$1,000. Omega will use the best available parts, which may not be the same as original. It will have a 2 year warranty from Omega, just like a new watch.
Any watchmaker with experience should be able to source the crown, crystal and hands from a supplier. The case will be more difficult. For that, you might need to find a non-runner or a raw Ref. 2846 gold-capped case on eBay. This was a very common Seamaster reference, although the ones with the "Grand Luxe" dials like yours are relatively rare.
Since you are in Canada and don't have to deal with Customs hassles, Al Archer would probably be your best bet if he is able to take on the project. He is very much in demand these days.
Hope this helps,
gatorcpa
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