Sorry Stephan, one of those lost in translation things.
W.D. was the Brittish war office, war department specification, for motorcycle handlebars fitted to W.D. ( war department ) Enfields. I don't know if the site host sells them, but if not Hitchcocks have them, in chrome. For me their use was more function over fashion, because of a bad shoulder. I've used these bars on two heavy duty sidecar outfits and they have been fine. I'm sitting with a friend just now who has suggested Ural bars which are specifically made for sidecar pilots.