So you reviewed all 140 or so watch suppliers listed in Salehoo's directory? Every single one? If so, that must have taken you at least a few weeks, working several hours a day.
I'm not saying you fit this criteria, but as I've coached hundreds of new online sellers over the past 8 1/2 years, almost every time one of them has told me they reviewed every single supplier in a particular directory and couldn't find anything good to sell, when I pressed them on the issue, they hadn't in fact thoroughly reviewed even a fraction of the suppliers listed. And by "thoroughly reviewed", I don't mean just reading their profile on the Salehoo page, but actually going to each one of their websites and reviewing their product offerings.
Additionally, I know for a fact that Sav-On Closeouts and Sav-On Wholesale often have popular brands of watches for sale on their sites, and they're among the first suppliers listed in the watch category in the Salehoo directory.
Nonetheless, the following supplier carries some excellent brand-name watches and isn't to my knowledge listed in the Salehoo directory yet:
I'm also familiar with a supplier known as Forest who carries a lot of popular brand name watches, but I don't know what their website URL is.
This may sound elementary, but I also suggest going to Google and typing in something like "bulova watch wholesaler" and see what comes up.