Additions from 2015 and 2016:
System Sensor P2RA
System Sensor SpectrAlert Advance P2RA Fire Alarm Horn/Str… | Flickr 
Siemens CU-MHU
Siemens CU-MHU Fire Alarm Horn | Device manufactured in 2005… | Flickr 
FOS 5509L
FOS 5509L Fire Alarm Strobe | Samuel | Flickr 
EST 965-1A-4RR
EST 965-1A-4RR Fire Alarm Speaker | Samuel | Flickr 
Siemens MTH-MC-W-B
Siemens MTH-MC-W-B Fire Alarm Horn/Strobe | Siemens-branded … | Flickr 
Edwards 364A
Edwards 364A Adaptahorn Fire Alarm Horn | Samuel | Flickr 
Simplex 4080-C5
Simplex 4080-C5 Fire Alarm Bell | Samuel | Flickr 
IBM 4030-2B
IBM 4030-2B Fire Alarm Horn | Samuel | Flickr
IBM 4252-1
IBM 4252-1 Fire Alarm Pull Station | Samuel | Flickr 
Siemens HMS-2S
Siemens HMS-2S Fire Alarm Pull Station | Two-stage Siemens p… | Flickr 
Cerberus Pyrotronics M46-31IBD
Cerberus Pyrotronics M46-31IBD Fire Alarm Pull Station | Flickr 
Edwards 270-SPO (older version, probably from the '60s)
Edwards 270-SPO Fire Alarm Pull Station | Samuel | Flickr 
Edwards 270-SPO (late '80s version)
Edwards 270-SPO Fire Alarm Pull Station | Samuel | Flickr