I have them on my 30 coupe.
I suspect I found something re-reading an article in an old Restorer or Model A Times but can't remember which issue. Is there a complete Index for all back copies of the magazines?
Both of my front bars on my 1928 have the raised mark as Marco shows & also have several FORD SCRIPTS on them...![]()
I've been at this awhile and never read anything speculating or claiming to know what "C" or "U" stood for. Here on the west coast "U" is all I ever find on car bumpers and bumper arms. However all the bumpers and arms I collected for my Roadster are matched with the "C" stamping. The "C" seems to be predominant in the east and mid-west.
The symbol shown below is also found on my bumper bars repeating every 11".
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My Canadian '29 also has D on the bumper arms & on the rear bumper bars. There is also a triangle logo on a clamp backing plate & ''1000" is stamped on the backs of the front bumper.My 1930 Canadian Standard Phaeton has "D" stamped on many parts including the bumper brackets. I will have to look at the original bumper, which is in storage to see if there are any marks on it.
Darryl in Fairbanks