Hmmm, so according to Passport to World Band Radio, the E1 was
manufactured at Bharat Electronics in Bangalore.

Bharat Electronics website:
http://www.bel-india.com/Website/Asp/HomePage.htm

FAS profile on Bharat Electronics:
http://www.fas.org/nuke/guide/india/contractor/bel.htm

Jai Hind.

junius