This from Mike Summa:;

Hello,
With all the fuss about Frankfort buying a Snorkel, here is an old photo of Frankfort’s first Snorkel.¬† Unknown manufacturer/type/height, but still great to look at.¬† Sold in later years to the Robbins Fire Department.¬† Hope you enjoy,
Mike S.
Frankfort PFD Snorkel

Frankfort PFD Snorkel. Mike Summa photo