I went on a siren Picture Extravaganza a bit ago, and I believe I have a few contendors...
The sun was in just a swell spot for this P-15 in Plainfield!
508-128 in Romeoville...nice to finally see one up close!
EOWS*115 in Rockdale, IL at the NRG Generating Station
The coolest SRN*B ever...in Romeoville
Bensenville's Banshee 115
An older one, but I saw this nice Sterling 20Jr. back at a fire muster last summer