I just bought a pedal tractor at an auction. It is an Ertl model O63. From what I have read on some websites it could be an 1800B, 1850, or an 1855. 

Unfortunately someone painted it the other shade of green with a yellow stripe, so I have no idea what it was to begin with. Any clues on telling what it was or can I just make it what I want? 

The casting is in good shape but it needs alot of the other parts that are available to restore it. Thanks for any help, John.