Hi Woodsy
Here is a great item from Max of Maxsmodels, on the history of the Klingon battle cruiser in the original Star Trek series, and the AMT kit.
The Klingon ship did not appear until the third and final season. The reason it appeared at all was the AMT, who had made a kit of the USS Enterprise, wanted an enemy ship to go with the Federation ship.
It was designed at the request of AMT, who provided the screen model for use in the series, so they could make and sell the kit. A great history lesson from Max.
Yours Sincerely,
Paul Adams from New Zealand