TWO VINTAGE VANGUARD PROTECTION SYSTEM METAL FIRE ALARMS MODEL V2-25 FT

Description

Description:
two Vintage Vanguard protection system metal fire alarms model V2-25 FT.
I believe these are some type of fire alarms, but not for sure.
They are made of a metal and heavy for their size.
Measurement:
6 inches wide around.
Contents:
two Vanguard protection system metal fire alarms model V2-25 FT.
Condition:
the alarms are still in good physical condition, with some surface stains and scratches.
Also, the top button area is missing on one of them, refer to the pictures.
I am not at all familiar with these alarms and have no ideal where they work or not.
I am selling them as is.
I purchase most all the items I sell at auctions, so therefore, my items are sold as is.
Questions are recommended if you are unsure of anything.