1934A Key To Series $5 FRN Hawaii WWII Emergency Currency Key To Series Grades vf++. FR-2302 Out of about 65 Million Hawaii Notes Printed in all Denominations Only about 7% of them were $5 that makes the $5 Hawaii The lowest Mintaged Hawaii In the series and makes it the key date for the series.1934a $5 Silver Certificate Hawaii, Signatures of Julian & Morgenthau. It was the darkest days of World War II, just after Pearl Harbor. Everybody in Hawaii was sitting on pins and needles. Were the Japanese preparing a massive invasion of the islands? If they did invade, they could use the millions of dollars in currency on the islands to buy war material. To thwart this, these $5 Federal Reserve Notes were sent to the islands. Each has a large HAWAII printed on the reverse. If the Japanese did invade, the currency would be demonetized. After the threat passed, most of these "Hawaii" Notes were destroyed. Today they're hard to find.