20¢ 2LR94
We are not certain that this is the proper image for this position.
"A re-entry with doubling of the oval band inside left centre and outside right centre, with a guide dot touching the left side of the portrait"
Research notes:
This stamp nicely matches Marler's description, but for the guide dot at at the left side of the portrait. The guide dot may be present, but it is very small.