Concealed siren on Presidential limousine
According to the documentation with the Lincoln shown below, the final convertible was built in 1968, but this car was configured in 1969. The Federal EG siren, maybe the only siren that would fit, is partially visible at lower left in the engine compartment.
The final photo is of a '74-'76 Security Car with vinyl roof & vinyl-covered sunroof. The yellow circle shows the lights used to illuminate the flags on each fender. The flag holders were removed before the sale. The owner said the car had running boards & hand-holds because he can see where they were cut away.
Of some 100 vehicles in the collection, all but 3 run, and include fire trucks, hit-and-miss one cylinder motors, several trucks, including an unrestored 1948 Chevy Railway Express, and the first motorized fire truck, or type of fire truck, owned by various fire departments, along with a Carole Lombard car.
They are in an unidentified, purpose-built, no-windows, heated & sprinklered brick building. Several unrestored vehicles are outside, including a '70's-vintage cab-over Ford with aerial ladder the owner drives to his house to decorate at Christmas. The collection is shown infrequently, but the convertible is used in local parades. A guard is on the grounds at all times, and a full-time mechanic cares for all vehicles. He said the owner typically comes in every day, picks out a car and uses it for that day's business. The owner's brother and sister are co-owners.
I don't know why the letter is sideways, but I welcome instructions on correcting, or for administrators to do so.