As mentioned here: http://www.mybulova.com/watches/1927-unknown-6987?page=1 I recently watched an excellent Webinar hosted by the NAWCC guest wrist watch curator, Adam R. Harris. In that Webinar, among the many interesting and unusual watches, this one especially caught my eye, and my full attention. 
"Very unusual" you may think, and it is. This watch is wound automatically by the movement of the whole of the watch movement/dial inside the case! These slide up and down, thus winding the watch. What is more unusual is the fact that it is actually a Bulova watch and movement, the dial has been refinished with an incorrect name! Adam mentions this is so, and his regret in not buying it when he had the chance is also mentioned during his display. What is further facinating is that this is not the only Bulova 1930's auto model he has seen, there is another that uses another unusual method of winding, almost exactly the same as the one in the below Webinar snippet. This one uses a "pendulum" system that moves side to side, and invented by Frey. 
Amazing I think you will agree, and something to look out for!
References, photographs, Adam Harris.
How bizarre. I can only assume that the patent for the bumper was sewn up and held by Harwood, although they went bust in 1931. Rolex bought a patent for a rotor winding watch in 1930, I believe. Rolex adverts credit Perrelet and Harwood for pioneering the technology, but the truth is, Perrelet was not the first, and Hubert Sarton was the inventor of the automatic winding function. I also remember reading somewhere that Le Roy also designed an auto wind function before Perrelet. Regardless, It appears that a variety of companies tried to come up with different ways for a watch to wind itself, and eventually the patents became public domain and everybody was making automatic watches.
Bumper movts based on Harwood can be found in Midos early on, and these are manufactured by AS.
I don't recognize that Bulova movt with the Bucherer dial, any idea what it is?
Edit: Rolex did not even file the patent til 33 and was granted in 34. No ads exist before 1934 mentioning a 'perpetual' rotor winding watch. They stole the name 'Perpetual', as it was patented before by Harwood. I watched the Webinar, and I must say it was very good. We researched auto winding while we were still in school, and our efforts indicated that Sarton produced the first rotor, but prior to that, his designs were seen by Perrelet, who was inspired to make his own self winding watch. Rolex still prints ads and booklets of their history with incorrect information.
Adam had the watch in hand six years ago, and mentions that it is made by Bulova, not Buchere, in the Webinar. The other one with the 'pendule' movement is just a movement that he has already found a case for.
Harwood started another company in 1931 utilizing very similar technology to that in his old watches. If you actually watch the Webinar, all info about the early automatics with ads, photos and patents is shown.
ob, Rolex actually claimed to invent the perpetual winding system for years, crediting Emil Borer. Not until Harwood sued did they give recognition, and change their ads to show John Harwoods face, and published a public apology in the press. Here is one of those early Swiss ads giving Harwood the recognition.
In reply to That's the ad I was by Reverend Rob
In reply to How did I miss this by William Smith
Here is a link to the new NAWCC Youtube site. The tutorial videos hold all three of Adam's webinars, and are much better than the link above. Those are huge, as much as four gigabytes! Much easier to access on this new link. https://www.youtube.com/user/nawccnwcm
