Notes: Clearly the dot at the Upper Right is sufficient to match this stamp to R&S #4-2, but notice the areas of doubling in the pictured item which are not indicated in the R&S diagram. To be fair, this is one of the less common 3¢ re-entries, and the sample(s) others worked with may have been heavily canceled.
A strip of four has been found with this variety in position 4 and 3F1.2 in position 2.