The number "1471" in white ink appears on recto. The photograph is titled "Dervish" on verso in what may be the hand of Antoin Sevruguin.
The gelatin silver print of this image in the Nelson collection has the number "26" in white in on recto and the number "1471" in not visible.
Page 40 of "Sevruguin's Iran" published by Barjesteh van Waalwijk van Doorn & Co's Uitgeversmaatschappij in Rotterdam and Zaman Publishers in Tehran. Titled: "A seated Dervish". The number "1471" in white appears on recto.