It's like these TOWIE girls, made up to look like models; underneath all the glitz and glamour, they're actually just stinky little tramps and not worth the cost of the make up in their bags.
Put it this way, would you buy the watch at that price without the branding on it, of another company i.e. Rolex, Franck Muller etc? If so then go ahead and buy it, if not then you are only buying it to kid on to people that you have spent £££££ on a watch and in reality you only spent ££ on it, and in reality you'll always know you're wearing a fraud.
Personally i'd keep your 80 quid, save another 150 and buy yourself a nice Emporia Armani watch which is genuine and people will appreciate it more, and you have piece of mind that it was manufactured under good quality control and if it fails you have some comeback.