I just found my old post on the horn.  I think Gene says that the horn was removed when the dealership installed the dual horns.

John, I can show you a picture of the horn that was on my 38 when I pulled it out of the barn. I was told it was not the factory horn but I really don't know.

Don' bother Tiny, in the old post you posted a picture, but you found out that it was wrong

@john-schildberg John, I have (I think, I'll need to look to verify I still have it) a horn that I bought that I've been told "looks" like the original manifold horn. I ran it for a short time but it doesn't honk well. It makes a noise but isn't loud so I put the horn that came with the car back on. It's shown in the picture below. You are welcome to it for the cost of shipping if you can use it. It'll need some attention to get it sounding normal. I will never use it for anything. Let me know.

Thank you Tiny, I will take it.  Find out the cost of shipping and I will get you the money!

@john-schildberg OK, we're in the middle of a heat wave so it might be a few days before I go digging through my "archives" to see if I still have it. If I do, I'll box it up and get it headed your way.