Dunbar-Nunn Unitrol "L" Siren

[DatedGore]

Does anyone have any information on the Dunbar-Nunn Unitrol "L" Siren? Had never seen one before until one popped up on facebook. Anyone have a brochure or anything with details? Manufactoring date?

 

[DatedGore]

no one knows anything?

 

[ur20v]

That's a terrible photo; do you have one of the entire faceplate?

From what is visible, it looks an awful lot like a Touchmaster TM4... Maybe this was the precursor to, or just an earlier name for the TM4?

 

[DatedGore]

 

[DatedGore]

I ended up buying it, the model number is "TM4" From what I've heard this is the "last?" siren made by Dunbar-Nunn before being bought out. I have no clue on this siren though. Nothing different tone wise, decals on the faceplate obviously different, I believe the boards are different. I do not have pictures of the boards in my regular TM4.

 

[shues]

For what it's worth, Federal Signal's acquisition of Unitrol from Dunbar-Nunn was announced January 1, 1996: https://web.archive.org/web/2019040...-product-line-of-dunbar-nunn-corporation.html

 

[DatedGore]

Anyone know more history on this Dunbar Nunn "L" siren?