Hoping to get some info on these horns. The tags say federal signal corp. The smaller one is definitely older. Both look like cast aluminum and are non-magnetic.
Small one is 3.5" dia., 7" long and says size 3M
Bigger one is 4.5" dia. 8" long and says size 4H
Just like the tag says… Federal Signal Horns.
They’re not train horns but should be very loud none the less. You can read more about them here:
http://www.federalsignaldistribution.com/audible/electro-mechanical_horns.htm
http://www.federalsignaldistribution.com/docs/audible/pdfs/IS-3H_6H.pdf
Interesting
Is that good or bad interesting?
Good or bad probably depends on which of their horns you have. I know some of them are used for tornado warning sirens in the Midwest – they’re loud and sound very distinctive. 
As in new & different. I learned a lil something.
Thanks for posting.
Yup. That’s where I know the name Federal Signal. I didn’t know they were into the horns posted above.
I grew up next to one of these:
