1983 Scientific Prototypes Mark 7 NYPD Siren demo

Demo of a rare Scientific Prototypes Mark 7 Siren made in 1983 that Belonged to the NYPD. The bottom Data Plate is Stamped Serial Number: 83 95 N.Y.C.P.D. meaning it was the 95th Mark 7 Siren made in 1983 for the New York City Police Department.