10¢ Blue 21UL2
Slight doubling of the top of both numeral boxes, stronger doubling in the bottom line of the right numeral box and in the centre of 'S'.
Comments
This image was provided by Leopold Beaudet and is from a plate strip of the dry printing. Plate 21 was used to print both the 10¢ Blue and the 10¢ Bistre and the same re-entry is found on a 10¢ Bistre.
