AH (94)2, 4.68gms, one of only two known examples. The central royal legend is ‘Muhammad Humayun Padishah Ghazi Sayyid al-Salâtin’. 

Humayun Shahrukhi, Mandu mint. 942AH. Humayun's titled as 'Sayyid al Salateen'. These rare Shahrukhis were wrongly attributed to 'Assam' but historical contexts proves these are of Mandu mint.

In November, 1534, Humayun moved from Agra to Gwalior where he halted for two months expecting that this would induce Bahadur to raise the siege of Chitor. When this proved fruitless, Humayun,proceeded to Sarangpur and then to Ujjain in the very heart of Malwa. After the fall of Chitor (8 March, 1535) Humayun moved northward towards Mandasor where Bahadur came down to meet him. Besieged by the Mughul troops, their supplies cut off, the Gujarat troops found themselves in a prison of their own making and one night Bahadur fled towards Mandu (25 April, 1535).

Mughuls who, after plundering his camp, pursued him to Mandu. Humayun laid siege to Mandu but realizing the difficulties of be¬ sieging such a gigantic fortress, twenty-three miles in circumference and defended by a large garrison, he opened negotiation for peace. Negotiations were going on and there was prospect of peace when the Mughuls, taking advantage of the consequent relaxation in the Gujarat garrison, made way into the fort through one of its unguarded parts and threw the enemy into confusion. Bahadur, roused from sleep, offered some resistance but, considering discretion as the better part of valour, slipped away to Champaner. 
The reduction of Mandu put Humayun in possession of the whole of Malwa.

Since the most significant rival in north India was Sultan Bahadur shah, on his defeat Humayun exalted himself on these coins as 'Sayyid al Salateen ' or 'Master of all sultans '

Thanks to Shailen Bhandare for deciphering the whole legend specially the 'ali shanahu' part and میرِ خوشنویسان (Mir-e Khoshnevisān)