The Twenty-one-cent Prexie
Registered second step indemnity
Registry with indemnity from $5.01 to $25.00 cost eighteen cents from July 1, 1932 until March 26, 1944.
This cover was sent by surface mail from Honolulu on August 4, 1942 and was registered for some amount over $5.00 but not over $25.00. The combination of fee and postage was twenty-one cents.
There is also a possiblity that the cover was double weight with first step indemnity. There is probably no way to know for sure with any such franking unless there is a notation somewhere on the envelope as to the value of the contents.