How old is my Gull?

Short of having the original reciept it's difficult to put an exact date on a specific boat but...

If it's wooden then it's a Mark 1 so will be some time after 1956. Mark 1's continued beign produced as kits at the same time as mark 2s and 3s so it's difficult to put an end date on it.

If it's GRP but doesn't have a fordeck then it's a Mark 2 so was built between