The 'light panel' designation distinguishes this from the earlier, visually heavier printings in the same Harrison & Sons series — a subtle but catalogued variation that collectors have separated from P#91 issues more broadly. Amouzegar served as Minister of Finance under the Shah across multiple administrations, which accounts for his signature appearing alongside three different Bank Markazi governors in quick succession during this short window. Farmanfarmaian's tenure was curtailed by his appointment as Iran's first IMF executive director in 1973.
The 'light panel' designation distinguishes this from the earlier, visually heavier printings in the same Harrison & Sons series — a subtle but catalogued variation that collectors have separated from P#91 issues more broadly. Amouzegar served as Minister of Finance under the Shah across multiple administrations, which accounts for his signature appearing alongside three different Bank Markazi governors in quick succession during this short window. Farmanfarmaian's tenure was curtailed by his appointment as Iran's first IMF executive director in 1973.