Despite what I say below, everyone is entitled to their trinkets if the value is worth it to you; if that's the case, regardless of what band you get, make sure it doesn't look like crap. In other wards, don't get a cheap/crappy band to pair with an expensive watch. To me, that watch looks like it needs a metal band that matches well; a leather band would look like a poor matches.
I hazard to say that watches in general are anti-mustachian, given their poor practicability nowadays (everyone caries a phone which tells the time). With that comment, I am refering to conventional watches; watches with more advanced functions such as GPS might be different; or a diver's watch which can handle high pressures might be useful to the diver while diving as time-telling is quite important in that situation. I also personally cannot stand the feeling/weight of a watch on my wrist.
I'd say sell your watch on ebay/craigslist. Trying to put a mustachian band on a non-mustachian watch might just look cheap, and may just be dumping more time/money into
Not sure if there are any watch experts out there but about 5 years ago, I purchased a Citizen Eco Drive 8651 watch. Link to google image picture below if that is allowed. If not, I'll edit it out.
http://images.bidorbuy.co.za/user_images/346/598346_100602155308_AP1021-54L1.jpg
I got a "great" deal on it but with that deal came the fact that the leather band was faded and ended up cracking very quickly. It is still wearable for now but I do want to replace the band before it completely splits. I know if I go through Citizen, I'll spend an arm and a leg but I really like my extremities. Anyone know what bands are compatible? I prefer blue leather or "leather" but metal is fine too.