I own quite a lot of expensive watches, but the only thing that gets attention is my Rolex. A lot of women, especially bougie/upper-middle-class women, are drawn to Rolexes, and I do think that it does help me in pulling a bit (perhaps adds 0.5 points to my SMV). And contrary to popular opinion, it attracts all girls, and DTF girls, not just gold-diggers who want beta bucks.
Honestly, if you want to get a nice watch just for pulling girls, I'd get a replica Rolex. Replicas these days are really high quality.
Ohterwise, the suggestions above are all solid choices. Seiko, Citizen are great value. Invicta actually isn't bad either, although the watch snobs/Hodinkee crowd might disgaree - they're good value I think. Lower-end Nomos, Stowa, etc, all good inexpensive brands. Check out wornandwound and the watchuseek forums for more info.