Age of Boat

[MarkD]

I am trying to narrow down what sail number our Winkle Brig might be: The trailer is dated 1988 from the VIN plate which seems possible and she is certainly one of the early designs. From dates on the register WB7 was from 1987 and WB41 was from 1990 - so that leaves 13 missing numbers in that range but is likely to be at the lower end so maybe No 8, 11, 12 or 13? Has anybody the date of build for their WB to narrow this down further or have any idea how one might find out? Her name, if original, is Tab Nab and I would guess from old plates she spent some time on the Norfolk Broads