I studied my std IV - std VII here.
The Address:
KV AFS Digaru ,
51 ASP C/O 99 APO
AirForce Station Digaru,
Sonapur , Distt. Kamrup, Assam.
APO is Army Post Office. I dont know what ASP stands for. This is a way of tagging Defence installations eg 25 ED (AFS Deolali, ED stands for Equipment Depot), 54 ASP(AFS Gurgaon), 7 wing(AFS Ambala), 32 wing(AFS Jodhpur) etc ..
This address is some 30 kms from Guwahati. And i have some vivid memories of the place and of 4 years of stay and schooling there.
It has really been a long long time. Thought of searching for some friends on orkut from KV Digaru. Remembered the names of some of the friends then, particularly, Pinkeshwar , which happens to be a very uncommon name. And yes, i got a hit and more-so dint have to browse through a long list. From his page, found a community for KV Digaru and from there got the link to school webpage.

There is this another image on the site which i am unable to relate to. Appears to be the entrance to the AFS campus or perhaps the entrance to the school premises ,in which case, its a later development.

Shall write more on those 4 years sometime. Oh! How I wish to be able to visit the school campus/AF campus sometime ..