This cross-gutter item contains the central portion of
an imperforate Jugoslavian sheet proof — it preserves
blocks the stamps printed in all four panes of the full
sheet (including a petro-stamp in the lower left). It is
fairly common to have different stamps printed in the
individual panes of a full sheet proof becuse the panes
normally are cut apart through the gutter areas.

© Peter A. Scholle, 2000

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