After careful inspection I came to the conclusion that the 1990 Honolulu Dala I recently acquired is in fact a rare not gold plated pattern.
The Royal Hawaiian Mint lists three coins with the 1990 Honolulu Dala die pair (two are silver and one is a gold plated bronze).
The specimen in my possession is bronze and not gold plated. The gold plated version has a mintage of 45 and is identified as a pattern.
From this information it can be said that I have a pattern coin that is not gold plated and its population is significantly lower than the indicated 45 mintage. I believe that his coin slipped by the gold platting process and was mistakenly sold. This maybe in fact a unique specimen.