Mike, a fellow collector here in New Zealand showed me this awesome specimen of an insulator he found when he was splitting some round blocks for firewood. The original chainsaw cuts luckily missed the steel pin and Mike was lucky to reveal such a superb example of what growing trees can do to foreign objects placed close to it or partly inserted in it. He recognised the interest value in it and is among the best of this type of relic.
The tree was a Macrocarpa and the timber is used for decking, furniture, housing, sleepers to name a few uses, plus for firewood.
The insulator is a typical 'no name' small groove top telephone type found here in New Zealand. It is of European manufacture and probably dates to the 30's.
Enjoy the pics.