My elementary school received a fire alarm upgrade in the early 1990s. They replaced the original system from the 60s with a Radionics system. The horns were Wheelock MTs, and I don’t know what the pull stations were.
Here comes the unnecessary replacement part: The school was renovated in 1997, and a new wing was added to the school. As a result, the entire Radionics system was thrown out and replaced with a Simplex 4004 with GX-90 horn/strobes. The Radionics system, including the Wheelock MTs, were up for only five or six years, which is unbelievable. There are still some MTs around the school today, but they are disconnected.