The inscription on the larger die reads: huwa allah ta'ala sha'nihi, be-yadgar-e jashn-e homayun sal-e panjahom-e jolus-e meymanat ma'nus-e dhat-e aqdas-e shahriyari, bar arkeh-ye saltanat va tajdari be-mobaraki va sa'adat va eqbal dar dar al-khalafe-ye tehran dhiqa'da 1313 (He is God, His Power Mighty. As a memorial for the Royal feast of the fiftieth year of the accession of the fortunate gladdening of the Royal sacred soul on the throne of the kingdom and [his] coronation in Auspiciousness and Happiness and Good-fortune in the capital Tehran [in] dhiqa'da (Sic.) 1313 (April-May 1896)).
The smaller one reads: be-yadgar-e tashrif-farma'i-ye janab-e mostatab prance dalghozoki (sic.) safir-e kabir-e dawlat-e bahiyya rusiyeh az zarrab-khaneh mobarakeh taqdim shod 25 rabi' al-awwal 1305 (It was presented from the Royal Mint-house as a memorial for the arrival of His Exalted Excellency Prince Dolgorukii, the Ambassador of the Russian State on 25 rabi' al-awwal 1305 (11 December 1887)).
Prince Dolgorukii was appointed in 1887. He followed shortly after the more famous member of the same exalted family, Prince Dimitri Dolgorukii who masterfully held the role from 1845-54. The family is a very prominent one in Russia, close to the Czar, descending originally directly from the founders of the city of Moscow.