Agree the OP watch looks like a redial.
In the U.K. (Or anywhere really), you can get a vintage watch at a reasonable price or quickly, not usually both.
Your options are;
1. be patient and you'll find one around £400 which will need a service (so budget another £100-250).
2. Pay a premium and get one within a week or so (but may still need a service).
As a rule of thumb, don't use a currency converter when people say "this watch should be found for $x". Simply replace $ with £ as watches are slightly more expensive in the U.K. So, when US members say this watch should be $500, don't read it as £360, read it as £500. This gives a more accurate representation of market value.