TYPE III
This imprint only exists on one plate of the 3c Orange produced in 1869.
This imprint is very distinctive because of the 'step' in the center of the imprint.
If an imprint exists without this 'step' then we will know that there is another plate
or at least another pane.
The imprint is 46 mm long and has both upper and lower case letters.
TYPE IV
The imprint is composed of only upper case letters.
It was used on plates for the 1c, 2c, 3c, and 6c during the period 1870-1873.
There are two slighly different forms of this imprint.
The apparent size difference between the two types may not be real.
These plates are harder to find and a study of more material may show that the size is somewhat random just as in Type V.
TYPE IVa
The imprint is 50.5 mm long and has dots at each side.
TYPE IVb
The imprint is 50.0 mm long and there are no dots.
TYPE V
This imprint was used on plates produced in the period 1874-1888.
The imprints vary in size from 53.5 mm to 54.5 mm.
This is imprint is found on 1/2c, 1c, 2c, 3c, 5c, 6c, and 10c plates.
There once again two varieties. The varieties seem to be date dependant at least for the 1c Yellow.
The plates with the letters C,D,E,F,G,H above the imprint all seem to be of type Va,
and the plates with S1,S2,S3,S4 seem to be of type Vb.
TYPE Va
There are dots at each side of the imprint.
TYPE Vb
There are no dots.
TYPE VI
The imprint is 48 mm long and was used for plates of the 2c, and 5c in 1889.
TYPE VII
The imprint is 40 mm long and was used for plates of the 1c, 2c, and 3c beginning in 1892.
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