My van is being rebuilt and is close to road tax free its an aks400 chassis number AK-AKB 07 AK134 Any body tell what year it left the factory please or even which country ta

Jeroen Cats' site is usually a good place to start...
http://www.cats-citroen.net/citroen/serialnumbers.html

1972 - from 02AK7001 to 05AK2926
1973 - from 05KA5001
1974 - from 08AK6501

Those are AM dates, not calendar dates - so autumn-to-autumn production. But given you're at 07KA...., it's probably that you're out of luck on free tax, somewhere in early/mid 1973 production.

DVLA would need something more concrete - either Citroen Conservatoire can do you an info pack, or Matt Concannon, 2cvgb's reg-of-reg, can get you a club-approved production date which DVLA would accept.

http://www.citroen.co.uk/about-us/histo ... ervatoire/