Vulcan Autosonic PVR Mark - 1 smoke detector (Ultra Rare)

Hey everyone this is my latest detector and birthday present to myself as well. The Vulcan Autosonic PVR Mark - 1 smoke detector. It is an ultra rare smoke detector apparently as well. This cane from an estate and actually has a working lamp plus a spare lamp and features a sliding test lever so this makes me think it's much later maybe 1973 although I couldn't find a date code anywhere on the unit. It does have a serial number 39197. This unit is very loud when it sounds and almost sounds totally like a DC squealer on my end. It works too well but no complaints from me that is for sure. It is also a photo electric smoke detector. If anyone knows an actual year or more about this unit please let me know. It is a cool find for sure!!!!

[@emilyr9182]

happy birthday jan :)

[@janeaton3417]

Thank you!!!