TubeNet

http://www.horniman.ac.uk/media/_file/b ... ts_web.pdf" target="_blank" target="_blank" target="_blank" target="_blank" target="_blank

I found the above pdf on a museum website that is storing the factory records of B&H
The museum's website is http://www.horniman.ac.uk/home" target="_blank

That's a great resource. Here is another interesting page about surviving Boosey etc instruments.