1¢ Green Coil 4UR10 A
Two guide dots at left centre - one touches the left side of the oval band while the other is just outside the left frame. There appears to be a third guide dot (under the cancel) in the upper left corner and there are several strong hairlines.
Research notes:
While not discussed in his book, Marler's personal collection had additional CPVs, often with multiple examples.In his collection, Marler had two, different, positions identified as coming from 4UR10. I have listed these as 4UR10 A and 4UR10 B. Hopefully examination of the proofs will help clarify.