I'm partial to art deco models myself.
The catalogs here are great resources. I would look at the the Hamilton catalogs by year.
Additionally, Elgin has MANY art deco models. In my opinion, I find that Elgin had a greater breadth of art deco models than Hamilton, but it seems that the documentation is scarce.
Theres a good catalog on the site here for Elgins here:viewtopic.php?f=30&t=5001
Also, there's a member here that has a great website, www.artdecowristwatches.com
. There's an archive of prior watches sold that's great for reference.
For Illinois, "The Illinois Watch".
I'm speaking to the American brands, but that's my preference.