found 78 rpm recording of dual tone Carters

[Mathew Bailey]

I have a collection of 12 inch Columbia 78 rpm records of the I Can Hear It Now series on the second world war before,during & after. On one side of one of the records is a recording of one or more dual tone Carters.
I sped up & slowed down that part of the record by hand to imitate the Glassport Thunderbolt siren in attack mode.

[Jim_Ferer]

Getting that sound digitized would be a great good deed of historic preservation. Go for it!