Test Your EFO Knowledge: Quiz Answers

2022 issues
2021 issues
2020 issues
2019 issues
2018 issues

How did you do in the quiz, EFO students?

Top row: Scott 55 (1921): Major shift of horizontal perfs.

Middle row:
Left: Scott 117a (1934) Miscut Goethals booklet pane.
Right: Scott 117 (1933) Plate block of four with vertical perforations shifted to include more than half of the plate number within stamp. Note the Canal Zone overprint.

Bottom row:
Left: Scott C50 (1974) Black shifted down. You can notice it best when you look at the plane's wings.
Right: Scott C53 (1976) Black shifted right. Here also you can see it most clearly by looking at the plane's wings.

The story featuring these stamps appeared in the January-March 2014 issue of The EFO Collector.

April 16^th, 2023