image by Somsubhra Chatterjee (Image rights)
National Instruments Ltd was a camera company in Jadavpur Kolkata, and is referred to as the only Indian camera company; perhaps it is the only Indian manufacturer of mass-produced cameras.
National Instruments produced one camera, the National-35, and was working toward production of a second, the National Reflex 2000, when it closed.
In January 2009 the factory, long derelict, was turned over to Jadavpur University.
The National-35 was in fact produced with the tool kits of the German King Regula Sprinty BC. King sold those designs and tool kits to National Instruments Ltd sometime in the late 1970's.