Mystery Siren - Part of Old Baltimore, MD Civil Defense System?

[Sargesson]

Hey. First post here on the board. I’ve gotten into sirens over the past few years but one siren in particular has gotten me really curious. There is a siren located on the Maiden Choice School in Baltimore, Maryland. It appears to be a Federal Signal Model 5 (not sure, not to good at identifying them). I have searched the forum, internet and even Maryland and Baltimore online records. I have found several online Google maps with siren locations, but not one includes this siren. It’s as if it doesn’t exist. I was wondering if anyone here had any ideas, sources, maps, images of anthing related to this siren and the old Baltimore Civil Defense system.
Thanks

Have no idea how to upload pictures. Lol. Got them from Google Street view. Side of the building facing I695.

[Jared H]

That's a Federal Model 5, and it likely is part of the somehow-still-active Baltimore system. Nice find.
Should be tested every Monday at 1pm.

[4J25]

I have a somewhat complete map of the Baltimore system somewhere in one of my "4j's Maps" posts here on the board. The system consisted of 3's, 5's, Thunderbolt 1000's, and at least one 2T22, however I'm unsure of the last one actually being part of the original system.

[Brendan W]

I mapped B more years ago and it was nowhere near complete. It most likely is a baltimore siren, but just one that nobody found before on here.