These VIN systems all sound very precise and logical and a useful "standard" but the reality is they are not. There has never been a hard and fast international "standard" VIN system. I've been here before even for my Supra. The VIN on the Supra and all the other Au cars not just mine doesn't 100% correspond to any known VIN system. Bits and pieces align but a lot of the digits don't. If you do research on the VIN numbering system it's anything but an international "standard" over the last 40 years.
From the shop manual for what thats worth.
Phil