Part if me thinks it looks like those older model 2s with 2 louvers or those strange sirens dotted around Los Angeles.
Upcoming recordings: undetermined proud owner of 4 siren advertisements from the early to mid 1900's Credit to Blasty for the amazing avatar!
Currently 14, and an Illinois native.
Fedelcode model 2 for sure. Not too long ago a guy on the board obtained one and the tag said "Type 2". The louvers on the HOR are larger and point down at a steeper angle.