I have a truck with a body like this. The maker was Christopher of Ny,Ny. They started somewhere around 47 doing these. I think yours is one of them. I have a Gmc Version and is a 1955 model.
They made them in 4 ways. Police,Fire,ambulance, or All In one. I have the all in one. I did see an add for the 47 - 53 that Auto Lit guy on ebay has the add. I paid 75 plus shipping for my add.
These are rare and mostly used buy the Civil Def. Most ambu. units were station wagons durring this time. so, to have what is called a high top is a rare piece.
If you want to email me at
[email protected] I can send you pics of mine. You will notice they are the same.
They would add pumps for the fire trucks. They were Foam units.
Those were cool. I have only seen one other christopher made unit and that was a 64 that was sold on escam a year ago..