Indian motorcycle horns

[FLFD7]

I was looking over some of my Indian motorcycle horns and I have a question. I have an original Indian horn, it is early because the cover has a rolled edge over the horn body:

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And I have a made up later horn where the face is attached to the horn with screws:

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And yes the horn body’s are different, the later one with the screw on face is an Auto-Lite, while the earlier horn has no markings. My question is when did Indian switch from the rolled edge horn to the screwed on cover?

[FLFD7]

I looked in Hatfields restoration guide but could find no information on the change. The only thing I could go by is the pictures.

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In this picture (photo credit to Hatfield) of a 1936 Four the back of the horn appears smooth, no screws.

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In this picture (photo credit to Hatfield) of a 1937 Chief I think I see screws there. I know these Indian publicity photos were airbrushed, but this is the only evidence I see in Hatfields book. I looked in the 1940 parts book (covers 1936 - 1940) and it only lists one horn, so maybe the change happened in 1935? Any guesses out there?

[motor-officer]

Do either of your horns have a patent number and the words "other pending" along the bottom edge of the face? Thank you.

[FLFD7]

Hey,
Yes they do. The original horn with the rolled over edge has the “REISSUE PAT NO 17.560”. “OTHERS PENDING “ stamp on the bottom….

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So does the later one….

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But that one is an older repop, I think from Timmerman in Germany.

[gsottl]

The early horn was also sold as "Moto-Vox" with a different face and different stud pattern. It was used on 1931-1933 Indians. In case it is available for sale, I am interested.

[FLFD7]

gsottl, not right now. My father has a 31 101 he was working on, I don’t know what horn he has for that one but from your info this is correct for that bike. I’ll let you know if I decide to let it go……Thanks for the information.