Just showing a couple new rare finds:
The first, a “second generation” Lifesaver Fyrnetics F900-D with the piezo. This was another open house find. FireAlarmFan had one in his original collection that the pitch of the piezo could be changed, however this one doesn’t have that.
And the second one, the super-rare Honeywell TC89B, which I’ve wanted for a LONG time and finally have one.