Hi can someone help with this siren, I have found a Heath laboratories siren model F 7.
The top part has the siracode brass company plate, and the motor has the universal motor GE logo company plate.
On the wiki site of Heath says its an industrial siren, and their only 2 Model F are known to exist.
I can seem to add pictures do not know how.
I s this a very rare siren, thanks for all your help
Patrick