Greetings Doug -- A quick look at the _Bulletin_ on-line Index didn't show an article on this theme by W&H. Might they -- as Modersohn asked -- intend to publish it elsewhere? If however it's to appear in the _Bulletin_, a quick e-note to Editor Diana de Lucca would no doubt indicate when or "whenabouts". Regards, Doug in AZ 118804.
or maybe an old bulletin which, for unknown reasons, landed on my nighttable, and which I was reading last night. hmm. will check.
No, turns out it's the April 2005 Nawcc bulletin. "Early Industrial Watches" part II. Part I was "Fahys of Sag Harbour, New York" in June 2001 bulletin, page 316 (per a note on the first page of the article).
By the way I enjoyed the article so much that I looked up part one. That has no where near so much information, as it is about the history of a building that made watch cases more than about the case making technology.