The number 690 in white appears on recto. The photograph is titled "Nizam al-mulk" on verso in what may be the hand of Antoin Sevruguin.
Myron Bement Smith Collection: Antoin Sevruguin Photographs. Freer Gallery of Art and Arthur M. Sackler Gallery Archives. Smithsonian Institution, Washington D.C. Gift of Katherine Dennis Smith, 1973-1985. Museum number: FSA A.4 2.12.Up.66. On recto of the print, handwritten number (inked, probably by Antoin Sevruguin) reads, "83." On recto of the print, handwritten number (inked, probably by Antoin Sevruguin) also reads, "690" in the same location as the print in the collection.