




Enlargements (above and below) of eight different imperforate trial single-color
proofs
of a 1959 French stamp depicting the Hassi-Messaoud oil field
stamp. All were
originally parts of sheets that included a strip of multicolor combination
prints used to select final print colors for this issue. An imperforate
version of the final stamp is shown below.

© Peter A. Scholle, 2000
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