These are World War II Hawaii silver certs. Made during perilous times during the war for the Hawaiian islands. There was a concern that the Japanese would conquer the islands, just like they had taken other US territory.
To be prudent the US issued these notes. The idea being they could demonetize them if necessary! Notes will be heavily circulated. However they will have tears or writing. Nice examples can be very expensive. Get an example for less!
/Notes pictured are the previous lot.