A nice site with pictures of drum machines from the drum museum. The Snare Drum Museum and the Drum Set Museum have many photos. The photos are good, but I was a bit bummed that they were all black and white. I bet the drum sets look great in color. The museum does have has some from first half of the 20th century, but most of them are from the 60's and the 70's. The last two snare drum pictures at the bottom are two of the oldest ones on this museum. The very last one is from 1800's (the dark one) and the one above it is from 1919.
There is also an online store where you can buy drums that are both current and vintage, and other drum related items but there aren't many photos in that section.
There are all type of resources such as "how to" do this and that (for example, restorations tips), and how to date drums. This site is pretty big with much information.
The Vintage Drum Center
July 14, 2009