Vin #s are not exact production order numbering. They simply are "an assignment". Someone gets a Vin # when they get them. Sometime later on, the cars are produced. This differs from other automakers who tend to assign a Vin# when the "Job" enters the painting period - when a bare frame starts to become a real car. Sometimes at Tesla, a Vin # has been given as much as 3+ months before production of those vehicles starts. There was a period in early 2014 where Hong Kong-destined cars got Vin #s in March and built in June. Those were Model S in the 37xxx and 38xxx range. Perhaps for shipping document usage - where they could setup for shipping later in the summer but knowing the Vin # early may have been important then. It has gotten a lot tighter lately with recent trends tending to 15 days or so from Vin# to production date (primarily North American cars). I see Australia customers reporting dates and they do have a few in the 41-85 day range from Vin# to production start, they seem to be the longest. Europe and Asia cars obviously are getting a Vin# visibly earlier before production starts when compared to USA cars.