Value within a wreath of two oak branches. Date below in Monarchical Calendar System (MS) or in Solar Hejira (SH).

Under Mohammad Reza's reign, Iran marked the anniversary of 2,500 years of continuous Persian monarchy since the founding of the Achaemenid Empire by Cyrus the Great – concurrent with this celebration, Mohammad Reza changed the benchmark of the Iranian calendar from the Solar Hejira (SH) to the beginning of the First Persian Empire, measured from Cyrus the Great's coronation. The Monarchical Calendar System (MS) was adopted in 1976 and was abandoned in 1978. The Solar Hejira was in use in Iran from 1925 until the introduction and after the abolishment of the MS.

Depicts an Emblem of the Imperial State of Iran (radiant lion holding sword, 1932-1980) within crowned wreath. State name in Persian below.

The Lion and Sun motif is one of the better-known emblems of Iran. The motif has many historical meanings. First, it was an astrological and zodiacal symbol. Under Safvis and first Qajar kings, it received a specifically Shi'ite interpretation. In Safavid era the lion and sun stood for two pillars of the society, state and religion. It became a national emblem during the Qajar era.

At the top of the coat of arms was the Pahlavi crown, created for the Coronation of Reza Shah in 1926, and the collar of the Order of Pahlavi was under the shield.