Here’s my (rather small) collection:
(Feb. 1 2022)
Top level back:
- Simplex TrueAlert 4906-9101
- Potter/RSG RMS-2T
- (Behind BG-12) System Sensor LENS-G
- System Sensor P2W
- Wheelock Exceeder HSR
- Honeywell WAVE2
- Fenwal halon release pull station (I forgot the model number)
Top level front:
- Ademco 529
- Honeywell 3808W3
- Fire-Lite BG-12L
- Napco Firewolf FWC-CNV-PULL
- Fake SpectrAlert Classic
- Atlas Soundolier SVT-72
- EST G1F-VM
- Kidde K-270-SPO
- Auth (Mirtone???) APS-10
Lower level:
- First Alert smoke alarm that I forgot the model number of haha
- First Alert CO400 CO alarm
In the lower right corner:
- Kidde Fire Away 110
- Some Kidde dry-chemical extinguisher
That’s my collection as of now. I will try to update at the end of each month.
Bye 
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A lot of classic models you’ve got. How did you acquire them, internet shopping, at work, or what?
Internet shopping. This is in my playroom.
Your playroom?
That is what I thought!
Yeah. I “work” out of my playroom when I’m not in school. My collection, before I got back into alarms, was in a single plastic box. It was small.
I forgot to mention: I also have a System Sensor SpectrAlert Classic H12/24W horn in the back row behind the APS-10 and the K-270-SPO.
Not sure if you read “Diary of a Wimpy Kid”, but bad things happen to those who refer to hanging out as “playing”. Book jokes aside, I did notice the white Horn/Strobe behind the t-bar, but I didn’t see the SpectrAlert Classic in that photo.
Diary Of a Wimpy Kid, or Diarrhea Of a Wimpy Kid, I can’t tell which is which.