I eluded to this in my last blog. Several of the Honolulu Mint coins were originally issued as jewelry. You have to remember that their competition back then was the Royal Hawaiian Mint gold coins. If you notice in the image, you can see the known images in Honolulu Mint gold coins (Kamehameha, Liliuokalani, and Kaiulani).
I suspect that the coins now being seen (graded by ANACS) are leftover jewelry inventory coins that were never mounted. These are 24KT gold and is relative soft for use as a coin. Again, jewelry use is pointed out due to its pureness. Also, these gold coins are not dated.
Here is an ANACS Honolulu Mint Kaiulani. Click to enlarge