Another possibility, is those alarms could be old Wheelock MTs. Maybe the Faraday installers put in Wheelock Signals and then switched to their own signals when the Siemens multi-tone horn was put in. I believe the only Faraday multi-tone horn had a clear strobe, and the alarms there did not have clear strobes. The Faraday installers also probably put in the Gentex GX-91s in. The Standard pulls and “Wheelock 7002ts” are probably the original devices. Apparently, the building is from the early 70s, according to my mom.
I believe Wheelock first started producing the 7001s and 7002s back in the early 70s. The alarms I am trying to identify are NOT 7001s, as I know those have the typical sized strobe. Also, the strobe on this alarm is on top. I am guessing they could be old Standard or Faraday horn/lights or horn/strobes. Did Standard or Faraday make a thinner version of the 7002 series during the 70s?