This sample is from a batch I have just received. Here are the 1c, 2c, and 3c Gray 1E3 issues.
The 2c has poor color control, atypical for such an infrequently used stamp.
Here is the watermark.
These two 2c used specimens show additional color variations.
This strip may be 1E4, but I am not sure of it.
These 3cSMGy1E3-SO shows variations in the overprint.
Here is a 3cSMGy1E4-SO