Looks like an alien falling out of a spaceship somewhere high up - LOL!

If I did it again I would've brought an engine crane with me to lift it into the back of the truck. That would've saved us some effort! One of the 2-ton Harbor Freight cranes boomed all the way out would do the trick.

Are Fedelcode and FS Model 5s the same thing? If so, my Model 5 weighs around 300 lbs and needed four adults to lift it into the back of a pick-up.

I'm not familiar with these sirens. Perhaps it's a freewheel mechanism like what's used on bicycles?

https://en.wikipedia.org/wiki/Freewheel

https://engineering.stackexchange.com/q ... -pedalling

Yes, the motor tag is the one that's missing. Is your shroud tag on the inside or outside? There is a tag located on the shroud with some number on it. I can't remember the exact location, maybe at the bottom of the shroud judging from the picture I have, but on mine I could make out some electrica...

My ~1950 Model 5 has a tag on the shroud and a tag on the motor. Did you check the motor?

A siren with an output capacity of 500 kg/day is pretty loud, right?

Definitely read the manual for the siren and that'll answer many of your questions about operations and maintenance. They're freely available from multiple places across the internet :) You can convert single-phase to three-phase using an appropriately-sized variable-speed drive. I think the drive n...

Another member here who's knowledgeable about the old Sterlings says the number at the end of the name indicates the year of manufacture, not a specific model. An M45 is a Model M built in 1945, for example.

That's what I was thinking.