Information wanted

Suffolk member Carl would like information on his water bowser. 
The bowser was previously being used at a Suffolk cricket club.
He thinks the bowser was used by the Dutch and built in 1980.
Other details found on the bowser. 
contract details 
leverancier           jaro
contract no 080-80-29.11 date 23-8-78
merk                  jaro
type                    ww950L
PRODUCTIE JAAR    1980

Any information you have on its use, what vehicle pulled it, how it came to be in the UK, etc.
Please email Carl  his address is   cyclemarster11@yahoo.com