When two or more stamps in a set share the same general
design, master dies typically are prepared without including
a denomination. The Iraqi die proof above, for example,
shows blank value frames — the die was duplicated,
values were inserted, and the dies were converted to
printing plates for the two stamps below. These
1942 stamps depicting the Baba Gugur discovery
well in the Kirkuk oil field.

© Peter A. Scholle, 2000

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