ID this 1973 coffee table?  

Has anyone got any ideas what this table is? (Please note, there are 4 of these legs that bolt onto a large round piece of plate glass, about 1" thick - I do not have the table assembled to take a picture.)

My mother purchased it in London in 1973. Her memory is hazy as to where she bought it, probably Heal's.

I am interested in selling it, but first need to find out what it is, so I can figure out what it is worth! As I am in the US these days, going to the V&A to look through the Heal's archives is not an easy or cheap option!

Many thanks,
Lucy