A coin issued by Ala ud-Din Khilji, with a Devanagari inscription around the border of the left face (though it can't be deciphered here)

Source: http://www.vcoins.com/ancient/dltcoins/store/viewItem.asp?idProduct=1542&large=0
(downloaded May 2007)

"Sultans of Delhi, 'Ala al-Din Muhammad Shah, AD 1296-1316. Denomination: Billon 2-Gani. Obverse: At center, Arabic Muhammad Shah; Nagari inscription in margin. Reverse: al-sultan / al-'azam 'Ala al-D- / -unya wa al-Din. Weight:  3.35gm. Diameter: 16mm." [Image and description courtesy of *David L. Tranbarger Rare Coins*.]

A closer look at the coin, showing a bit more of the Devanagari inscription

"DELHI SULTANATE, 'Ala' al-din Muhammad Khalji (1296-1316) Billon 2-gani. Obverse: Legend: al-sultan al-azam ala' al-dunya wa'l din. Reverse: Legend, within circle: Shah Muhammad, around, in Nagari: sri sultan alavadin. Date  AH 695-715 (= 1296-1316 CE). Weight 3.48 gm. Diameter 15 mm."

A silver tanka coined in AH 711 (1311/2), near the end of his reign

Source: http://www.vcoins.com/ancient/coinindia/store/viewitem.asp?idProduct=622
(downloaded Feb. 2008)

"DELHI SULTANATE, 'Ala' al-din Muhammad Khalji (1296-1316) Silver tanka of Hadrat Dehli. Obverse: Legend. Reverse: Legend, naming the king as Sikandar al-thani (the second Alexander). Date  AH 711 ( = 1312 CE). Weight 10.82 gm. Diameter 27 mm."