Some of these are actually from the Prudential Center Mall, others from Copley Place.
Federal SelecTone behind an SAE A34 light plate, from Copley Place.
Simplex TrueAlert speaker/strobe, found at the entrance of 101 Huntington Avenue in the Back Bay Arcade of the Prudential Center Mall.
Simplex LifeAlarm speaker on a 9501 strobe plate somewhere at the Prudential Center, probably Back Bay Arcade. This one is installed incorrectly.
Gentex GSX strobe next to a Simplex LifeAlarm. These are found on the ceiling at the Prudential Arcade section right opposite the entrance to the tower.
Gentex GSX strobe next to a Simplex “megaphone” speaker. This can be found in the Belvedere Arcade of the Pru. Also, one of the Gentex strobes has a LifeAlarm next to it.
Simplex LifeAlarm speaker on a 9501 strobe plate at the Prudential Center mall. Most of the alarms in the mall are installed like this. I believe this particular alarm is located by the elevator, as I remember the wall being marble.
Ceiling mount Simplex TureAlert speaker/strobe. Copley place is slowly replacing their SAE alarms with Simplex alarms.