More details of Beaver ZK-CTJ, and also Beaver ZK-CYD c/n 1615, have been sent to me by Falcon123.
Falcon123 advises that 5Y-AIV (ex ZK-CYD) and 5Y-AIW (ex ZK-CTJ) were first noted as such on the Western apron at Wellington on 25-03-1969.
Both were flown from Wellington to Auckland (with possible stops in between) on 28-05-1969.
Both departed Auckland for Norfolk Island and Brisbane on 29-05-1969.
For more pics of these two (and many more NZ aircraft) go to http://www.kiwibeavers.com/
You will find a list of NZ Beavers down the left hand side of the header page.
Also note the pending Lawson Field reunion.
Thanks to Falcon123 and Graeme Mills (Kiwibeaver).