2pNGR plate varieties with three visible blue corners

This cover bears a 2pNGR with three visible blue corners.



Here is a detail of the 2pNGR and the 30cNGR.



Here is a detail of the 2pNGR.



There are Lower and Upper Left corners similar to some of the stamps with two visible blue corners, and a third corner Upper Right.







The 30c on this cover also has some plate wear to the bottom letters and the value box.