- Thunderbolt siren in Jessup Park [08]
- Thunderbolt siren in Jessup Park [07]
- Thunderbolt siren in Jessup Park [06]
- Thunderbolt siren in Jessup Park [05]
- Thunderbolt siren in Jessup Park [04]
- Thunderbolt siren in Jessup Park [03]
- Thunderbolt siren in Jessup Park [02]
- Thunderbolt siren in Jessup Park [01]
- Siren at Jefferson Volunteer Fire Company [01]
- Siren at Jefferson Volunteer Fire Company [02]
- Thunderbolt siren on Waterloo Road [09]
- Thunderbolt siren on Waterloo Road [08]
- Thunderbolt siren on Waterloo Road [07]
- Thunderbolt siren on Waterloo Road [04]
- Thunderbolt siren in Jessup Park [10]
- Thunderbolt siren in Jessup Park [09]
- Thunderbolt siren on Waterloo Road [17]
- Thunderbolt siren on Waterloo Road [06]
- Thunderbolt siren in Jessup Park [14]
- Thunderbolt siren in Jessup Park [13]
- Thunderbolt siren in Jessup Park [12]
- Thunderbolt siren on Waterloo Road [14]
- Thunderbolt siren on Waterloo Road [03]
- Thunderbolt siren on Waterloo Road [02]
- Thunderbolt siren on Waterloo Road [05]
- Thunderbolt siren in Jessup Park [11]
- Thunderbolt siren on Waterloo Road [13]
- Thunderbolt siren on Waterloo Road [01]
- Thunderbolt siren on Waterloo Road [16]
- Thunderbolt siren on Waterloo Road [15]
- Thunderbolt siren on Waterloo Road [12]
- Thunderbolt siren on Waterloo Road [11]
- Thunderbolt siren on Waterloo Road [10]
- Federal Signal Model 2 siren at Verona Fire Department [03]
- Federal Signal Model 2 siren at Verona Fire Department [02]
- Federal Signal Model 2 siren at Verona Fire Department [01]
- Siren at Waynesboro Fire Department [01]
- Siren at Waynesboro Fire Department [04]
- Siren at Waynesboro Fire Department [03]
- Siren at Waynesboro Fire Department [02]
- Siren on Eastwick Library in Philadelphia [01]
- Siren on Eastwick Library in Philadelphia [02]
- Siren on Eastwick Library in Philadelphia [03]
- Siren on Eastwick Library in Philadelphia [04]
- Siren on Eastwick Library in Philadelphia [05]
- Federal Signal Modulator in Atlantic City [01]
- Federal Signal Modulator in Atlantic City [02]
- Federal Signal Modulator in Atlantic City [03]
- Federal Signal Modulator in Atlantic City [04]
- Siren at Warrenton Volunteer Fire Company
- Siren at Stuarts Draft Volunteer Fire Department [03]
- Siren at Stuarts Draft Volunteer Fire Department [01]
- Siren at Stuarts Draft Volunteer Fire Department [02]
- Federal Signal Model 5 siren in Lucketts, Virginia [01]
- Federal Signal Model 5 siren in Lucketts, Virginia [02]
- Siren at Fairfield Fire & EMS [01]
- Siren at Fairfield Fire & EMS [02]
- Sirens at Gaithersburg Fire Museum
- Flood warning system in downtown Ellicott City [02]
- Flood warning system in downtown Ellicott City [03]
- Flood warning system in downtown Ellicott City [01]
- Belfast Fire Department siren [01]
- Siren at Calypso Volunteer Fire Department [02]
- Siren at Calypso Volunteer Fire Department [01]
- W.S. Darley Model 2 siren at Rosewood Fire Department [01]
- Belfast Fire Department siren [02]
- W.S. Darley Model 2 siren at Rosewood Fire Department [02]
- W.S. Darley Model 2 siren at Rosewood Fire Department [03]
- Siren at El-Roy Volunteer Fire Department
- Siren at Wyse Fork Volunteer Fire Department
- Water tower with siren in Emporia, Virginia [01]
- Darley Model 5 siren in Gaston, North Carolina
- Woomy on top of a siren
- Fedelcode Model 20 in Halifax, North Carolina
- Water tower with siren in Emporia, Virginia [02]
- Water tower with siren in Emporia, Virginia [03]
- Siren at 1300 West Broad Street [01]
- Siren at 1300 West Broad Street [02]
- ACA P-15 siren in Mechanicsburg, Pennsylvania [01]
- ACA P-15 siren in Mechanicsburg, Pennsylvania [02]