Also, not all numbers are produced in sequence and some not produced at all. The only definitive check would be to confirm with the factory.
My Series 4, along with the series 4 built for Charles Morgan's sister were the first Aero's of 2009. My chassis number is 706.
We have a member here Greymog, whose chassis number is 703 for build in March 09.
For mine, the difference could be that I ordered my car in late 2007 with a delivery date of March 2009 but then in January 08 brought the delivery forward to be in the group of first 2009 cars for the handover party.
