Quote:
Originally Posted by Werner
Rotorwrench,
please tell me, what's <GEM units>?
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I should have used the correct letters "GIM". it was an abbreviation for General Industries Manufacturing. They were one of the five suppliers to Ford and had a well built unit. Spartan and Stewart-Warner units were more common and the Ames, EA, and GIM were less so depending on date of manufacture. EA (Emanuel Aufiero) made a lot of horns in the first two years but with the competition, not as many in later years. Some suppliers were manufacturing at higher rates than others also depending on the time frame. Ford didn't care who made them as long as they could supply a reliable unit and keep up with demand. All of them manufactured products for other automakers.
The Restorer Series of books volume 9 page 4 has a very good article on all the different horns. All of the horns are very similar and they tend to share similar problems as they age.