An exhaustive research led me to the name and origins of the manufacturers of this rocker - Rex Co. One search led to another and I was sad to find that the company was going to discontinue their rocker production. The reason being, dwindling supply of air dried white oak wood used for making these classics. As such most furniture makers use kiln dried wood.
After knowing more about rocking chair companies, I researched further and came to know about Brumby Rockers Here is the link to the manufacturer: Brumby Rocker , GA. I was excited to read about the history associated with the jumbo rocker. A few other write ups in various magazines mention these rockers were a southern United States porch/veranda staple. It was exciting to know that 39th US President Jimmy Carter had one such piece on the white house porch during his presidency.
Mine is a similar style, and I am ok cos i cannot afford an original Brumby right now.
Here is the picture of the one I bought! one from Rex Co.