Replica vintage isn’t worth it to be honest , have a look on omega forums , watch u seek forums then take a look at eBay
i picked up a 1977 Omega Deville manual wind for £100
it needs a service but still runs fantastic, all I have done is put a new strap on and a vintage omega buckle
so long story short go gen for vintage it’s a great way to actually own a genuine high end Swiss brand for not much money