Identity of Car Clocks

by Sue
(Weatherford, TX)

I recently bought 3 vintage car clocks at auction just because I thought they were "neat". Unfortunately, I have not been able to find information about any of them.

One is diamond shaped brass with the name Dieppe on the enamel face. Another is round brass with the name Denver and Made in USA on the face. The other is painted black metal and a faux wood finish circling the face. J-M and Made in USA are printed on the face.

I would just like to know something about them, such as age, kind of car they may have been in, etc. All three seem to be running well and are in very good condition. Any information will be appreciated.