The dial looks nice and original IMO. The hands are either replacements or relumed. Crystal doesn't have the Omega symbol in the middle. Case has been heavily polished. Not sure about the crown. I think it is genuine Omega, just not correct for this watch.
I know that items in general bring higher prices in the UK, but I think the current price of about $300 is about as high as it should be valued in the USA.
It's very hard to find nice, original specimens coming from the UK in recent years. My guess is that most British dealers feel that their customers will pay more for clean, but incorrectly restored watches.
Sadly, they're probably right,
gatorcpa
Edit - to Bob - The movement
is a cal. 503. Omega used a flat top "3":
View attachment 4804
The Omega Vintage Database for the steel version (CK 2849) shows production dates from 1956-62. That one could have been made in 1958. The serial number tables can be off two years or more, as movements sometimes sat in inventory for a time before actually being cased and sold.
The only way to know is to pay for an archive extract from Omega, and even they get it wrong on occasion.
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