Can anyone ID this part?

[kurly]

I have a '57 Racine County Sheriff bike. A friend put a siren on his '63,and I would like to put one on mine. I started looking through my junk and found this part. It looks like a siren pedal but not like any in my parts books. Can anyone identify this part?
Thank you, Curly

[Rubone]

It is indeed a siren pedal, however it is for foot control of a FRONT fender mounted siren, not a rear one. The bracket is 91252-58 and the pedal is 91250-58. The bolt is 91260-58. It was used with the -58 type siren. Your '57 would use the earlier tranny mount siren and the cast pedal.

[kurly]

Robbie, thank you very much.
Curly