In this picture, Ustad Amir Khan, Ustad Vilayat Khan and a very young Ustad Amjad Ali Khan together. (taken from the Facebook group: Ustad Vilayat Khan – rare moments – see my links section for the link to this album)
Ustad Amir Khan influenced an entire generation of musicians, including Ustad Vilayat Khan, who changed the sitar landscape forever and in turn had a lasting impact on Ustad Amjad Ali Khan, who was inspired to develop the vocal style on the sarod as a result.

I’m surprised that you have a pic of them. It is indeed rare and by posting it here, you have preserved the memory of them forever.
Cecile Lan
http://ohealthlounge.com.au