The colour changes resulted from an agreed standardization of postal rates through the Universal Postal Union (UPU). When the domestic rate changed to three cents, the three-cents value had to change to carmine, while the one- and two-cents values changed to yellow and green. The new ten cents UPU rate required the ten-cents value to change to blue, which in turn caused the five-cents denomination to be issued in violet. When the UPU rate changed to eight cents, with an attendant switch in colour to blue, the ten-cents value was changed to bistre brown.
One Cent | drop letters/newspapers |
Two Cents | domestic mail and mail to the US, UK, British possessions and Ireland |
Three Cents | consolidated (incl war tax) domestic rate and, for a time, to the UK, British possessions and Ireland |
Four Cents | increased rate for UK, British possessions and Ireland |
Five Cents | blue - foreign rate and registered mail; violet - registered mail after foreign rate change |
Seven Cents | registered (5c) plus domestic rate (2c) |
Eight Cents | foreign rate after rate change |
Ten Cents | increments of indemnity registrations, foreign rate (for a time) |
Twenty Cents | increments of registration indemnity and heavier items |
Fifty Cents | increments of registration indemnity and heavier items |
One Dollar | increments of registration indemnity and heavier items |
Updated: 5 Oct 97