Know of a good site? Let me know and I'll add it.
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Automobiles of the Early 20th Century
Ultimate list of links to Automobile History & Trivia (Thanks to Alex J. from Oregon)
Brassworks - Radiator and Shell Fabrication
Ft Wayne Clutch
Gardner Signs - AmericanIkons
John Wolf & Co. Gauges and Instrumentation restoration
Tool Masters - Grant Park IL - Hub Caps
Wikipeda Brief History of Gardner