These are fairly unknown silver issues struck by The Honolulu Mint.
My previous blog about the gold version (with images) of:
Queen Liliuokalani design. http://wp.me/p3eNTe-wk
King Kalakaua design: http://wp.me/p3eNTe-wu
The style of both coins differ slightly.
On the obverse: English vs Hawaiian. Date vs year only.
On the reverse: Placement of words ‘IOLANI PALACE. Change in fonts. Size and detail of the palace.