They don't sell through dealers and their business model is now 100% online - orders through their website only I'm afraid.
From wikipedia: "Since around 2001/02, STOWA has almost exclusively sold its watches directly to the customer, either through its website or from its factory in Engelsbrand. STOWA claims that this allows them to keep their distribution, wholesale, and retail costs down, thereby allowing their prices to be lower than if their watches were distributed through a traditional retail network."
Bit of a waiting list for their watches but usually <6 mths and well worth the wait
Their history is what attracted me to their watches in the first place - ......World War II broke out. Since combat aircraft had become such a powerful wartime tool, navigator’s watches were put into full production along with the other more direct weapons. The German government demanded five manufacturers to build competent B-uhr watches which were both anti magnetic and able to be chronometer certified. It is believed that A. Lange & Sohne, a principal supplier of the time, could not deliver the watches in time for the amounts needed. The German government therefore brought the raw movements and cases to other watchmakers for mounting and regulating. The five companies that were assigned to build the watches were A.Lange & Sohne, International Watch Company, Laco, Stowa and Wempe.