Ala al-Din Mahmud Khalji, Gold 1/2 Tanka, 5.51g, Hadrat Shadiabad Mint, AH 842, Arabic legend on both sides, Obv: “al-Sultan al-Azam 'Ala al-Dunya wa al-Din Abu al-Muzaffar Mahmud Shah al-Khalji Khallada Allah Khilafatahu”, Rev: “Sikandar al-Thani Yamin al-Khilafah Nasir Amir al-Mumineen”, within circle, date and Mint details in margin (Not listed in G&G and possibly second piece known). Extremely fine, extremely rare.