English: The signature of Guru Har Rai (Punjabi: ਨੀਸਾਣੁ [neeshaaṇ]; meaning "sign, mark, insignia [of approval]") written in Gurmukhi. (Courtesy - Professor Anurag Singh)

This is a facsimile of the signature of Guru Har Rai found in the codex of the Granth Sahib given to Baba Ram Rai and brought to Aurangzeb's court.

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Description for the photocopy of the original manuscript's folio that contains the signature (viewable at: File:Nishan (signature) of Guru Har Rai at the beginning of the Granth Sahib codex which was given to Ram Rai and brought to Aurangzeb's court, ca.1644–1661.jpg):

Nishan (signature) of Guru Har Rai at the beginning of the Granth Sahib codex which was given to Ram Rai and brought to Aurangzeb's court, ca.1644–1661. The manuscript is still preserved and kept at Guru Ram Rai Darbar Sahib, Dehradun.

Neesaan (signature) of Sri Guru Har Rai Ji, at the beginning of Sri Guru Granth Sahib Ji Saroop, which was given by Guru Sahib to their son Ram Rai when he was sent to Aurangzeb's court. This Saroop is still preserved in Baba Ram Rai's Durbar, Dehradun.

This photograph (and information about it) was published in a book titled 'Life of Guru Har Krishan: A Biography & History' written by Dr. Trilochan Singh.