I have received a set of detail shots of a 53 Barnett ambulance. we had only found artist renditions before so I'm sorry to say we now can rule out the 53 I have here as being a Barnett. the lights are not right and all the Barnett's I see have the right hand hinge rear door. I can't find any holes were the Bernette name plate would be either. so we have ruled out Economy because they did the side doors in a different fashion along with National. Acme as there widowers were different, but I have not seen a Acme ambulance. with the picture posted of the 54 Superior it looking more like it may be built by them. anyone have any pictures of a Superior Pontiac ambulance in the early fifties that we might be able to compare the light treatments on? anyone have a picture of a 53 sedan deliver ambulance built by Superior?? here is the detail shot and you can see were the doors are rounded off the same the lights are definitely different.