Bill Smith just posted this on the Wheelmen site:
Dave,
Great post on hubs. I have searched through my Iver Johnson and Lovell Diamond catalogs with many of the early ones containing a lot of bicycle sundries. The 1903, the Lovell Diamond Bicycle Supplies Catalog shows the Model A the first time, calling it the 1903 Model. I was able to track the Model A through to 1926. In 1920, the Lovell Diamond catalog shows a Model C for the first time. I think this Model must have ran through 1933. In a 1934 Ward's Catalog, I found what they call the new Model D brake hub in nickel finish. They claimed it had 90% braking surface than the old model which apparently was the Model C. If you compare the Model C and D, it is very evident that the D has many more braking washers than the C, giving a much better braking ability. The 1936 Ward's Catalog now has the Model D in a chrome finish. After 1959, the Mattatuck brought out New Departure and lasted until the mid-sixties.
There are images on the Wheelmen site you might want to take a look at
http://www.thewheelmen.org/forum/topic.asp?TOPIC_ID=5104