Paddy Wagon in dark blue enamel.  I've had so many of these over the years, simply because this great model is so easy to find at a reasonable price.  I picked this one up via mail order in 1995.  This example carries the gold chrome lettering and has some toning in the motor.  I also have one with chrome lettering with a beautiful motor.  I still have my original one from 1970 as well.