were they TATA made or CLW?

This assembly was used for AC traction masts in the early 70s (or before) - such as Howrah-Tundla/Durg, Igatpuri-Bhusaval, Virar-Ahmedabad. Since then, they changed the orientation of the register arm dropper so that it originates from the middle of the bracket tube instead of the top. As an illustration, take a look at the left mast in http://www.irfca.org/gallery/openline/IMG_5833.jpg.html and note the orientation of the register arm dropper - the length gets cut down by half, resulting in huge savings in raw material.

Many more can be found at this very informative site - http://www.indianrailways.gov.in/financecode/ACTraction-II-P-II/AcTractionIIAppendix10.htm .

Can someone explain this? Where is Cantilever Assembly used?

Mr. Anonymous, very nice collection of liveries.

Nice work! The second one though is almost entirely based of UK's Network South East livery.

Nice liveries.

Yeah. I agree with Binai. The first one is the current MRVC livery. Other two liveries look superb!

This diagram is detailed explanation of arrangement for charging of main vacuum reservoir. Bottom of picture shows outgoing connection for distributor valve and brake pipe. Dushyant Jani

This diagram explains how to charge & discharge vacuum while hauling vacuum braked rakes. NRV are Non Return Valves which ensures uni-directional flow. Dushyant Jani.