Original horn question

[Vin-tin]

Calling all horn experts...
I picked up a E.A. Laboratories model FM horn. According to the judging standards, the bell flange and motor base should have "E.A." stamped on them. I have the horn stripped down to bare metal and i'm not seeing any identification marks or lettering, except on the motor cover.
How tall are the letters "E.A." and where are they usually marked?

I did use the search feature on here and wasn't able to find a definitive answer.