Edwards 281B Category : EST/Edwards This unit is in a bit better condition than my other Edwards 281B. Brand EST/EdwardsModel 281BManufacturer EdwardsType Heat Detector
GE/EST SIGA-278 Category : EST/Edwards, GEThe metal components on this pull are a bit rusty. It is co-branded by GE and EST.
Simplex 4904-9137 Category : SimplexThis is, in fact, a Simplex 4904-9137. It’s just missing its housing.