Salman's gesture was owing to the fact that Nikhil walked the ramp in Dubai for his NGO Being Human. After the show, to express his appreciation that Nikhil was part of the event along with Riteish Deshmukh, Salman gifted them both a branded watch each.
These watches have been designed, customized and especially branded for Being Human. The designers for this show were Wendell Rodrigues and Salman's sister Alvira Khan. Well, Nikhil walked the ramp for a cause and needless to say he was quite touched by Salman's sweet gesture.
So, next time you see Nikhil sporting and even flaunting is cool new watch, know where it came from!