Simplex 2098-9637 Fire Alarm Detector Base Photoelectric With Relay Module

Simplex 2098-9637 Conventional Fire Alarm Detector Base (Yellowed)

Simplex 2098-9637 Fire Alarm Detector Base Photoelectric w/ Relay Module

Simplex 2098-9637 Fire Alarm Detector Base 20989637

Simplex 4098-9714 Fire Alarm Smoke Detector With 4098-9792 Base

SIMPLEX 2098-9637 Fire Alarm Detector Base Without Module **Yellowed**

Vintage Simplex 477-669 Fire Alarm Photoelectric Smoke Detector Head

Simplex 2098-9529 Fire Alarm Detector Base With Integral Heat Detector