Read this... As per the discussion with the person in the photograph, folklore and Wikipedia:
The instrument being played in the photograph and widely seen in the Indian state of Rajasthan is called Ravanahatta, Ravanahatha.. aka.. Ravana hastha veena.. literal meaning "Veena in the Hand of or played by Ravana"
This ancient Indian stringed musical instrument is understood to be the ancestor of and inspiration for the today's Violin. And it is believed to be belonging to 5000 BC and also been played by RAVANA.. And folklore says Lord Hanuman carried it to Rajasthan once the Rama-Ravana War ended - now don't ask me why he had to specifically travel to Rajasthan..
Thanks to the people of Rajasthan for still keeping this and the heritage alive...