Searching for the yacht TELSTAR

Can you assist?
Good Morning,
I’m trying to track down the yacht my grandfather Ivan Vitali built in the early 70’s, the yacht was called Telstar, sail number 1263.  
It was approximately 34ft and of a similar design to an S & S 34 of the same era. The hull was red below the water line, with white above it and wooden cockpit. It started out sailing around the Auckland region but when my grandfather passed away it was eventually sailed all over the world.

Are there any boats by that name moored, berthed or registered in the Otago area? Or do you know anything about this yacht and where it may be or anyone you may think can help?

Thanks for your help.

Drew Thompson