My Sterling Siren Type/MOD. F

[Snowpix]

A few months ago I managed to get my hands on a Sterling Siren Type F, or MOD. F as mine is tagged. For those not in the know, these are the predecessor to the Sterling/Sentry F-2, and were produced until the early 1970s. Mine is a fourth generation model, most likely from the 1960s. It's not in great physical shape, but it seems to run pretty well compared to other Type Fs I've seen. Type Fs themselves are pretty uncommon, and I managed to snag this for cheap from someone who didn't know what they were worth.

Test video:
https://www.youtube.com/watch?v=KvsGiL15g1k
Test alongside my Model L:
https://www.youtube.com/watch?v=12iiya1htto&t=41s

Pictures:
My Type F next to my FS&S Model L
https://imgur.com/a/AXMNGur
Up close
https://imgur.com/a/Oen4wrg
The front of the rotor
https://imgur.com/a/wUYm8Jb
The tag
https://imgur.com/a/RXxR2j0
The core of the siren
https://imgur.com/a/t0AKm5y
The motor
https://imgur.com/a/1Qflnmg