A very accessible and interesting stamp for the philatelist, the 1d shield was first issued in 1897 and can be found with four different watermarks, two die types and in a range of shades, some of which react impressively under the UV lamp.
Members are invited to contribute any information about these humble yet wonderful stamps on this thread.
Rare and valuable varieties exist such as the double impression, the perforation 11 issue and various imperf configurations.
There are also plate varieties such as the catalogued void corners and plate crack, as well as loads of constant yet uncatalogued varieties. One of the latter that can be found with some hunting is the missing lines on the right '1', shown below.