Like so many of ACA's sirens, there is many versions and remakes of the Banshee. The Banshee line began in 1967 and ended in 2004. Here is a list of the models:
Banshee 110
The Banshee 110 began production in 1967 and ended in 1973. It had a rating of 112db at 100ft and could be fitted with a damper, which could create a pulse signal.Banshee 115
Produced from 1973-1994, this siren had a 116db rating at 100ft and could also be fitted with a damper.Banshee 120
Also known as a SuperBanshee, this siren had two motors and appeared to be two Banshees stacked on top of each other. This siren, if bought with a damper, could do Hi-Lo.Performance Plus Banshee
This was a 115 with a DC to AC converter and batteries. Louder than regular Banshee 115. The PN-20 was also a Performance Plus siren.OM-117-AC
Renewal of the ACA Banshee 115, oddly 1db higher ratings.OM-120-DC
Performance Plus renewal. Included batteries.Other findings
Online I found photos of a Werden Siren version of the Banshee, but I did not investigate further.
SuperBanshee
Banshee 110