Help please! I.D Marble top dining table / desk  

Hi,
I would love to ID this dining table / desk , its a marble top,
does anyone have any ideas of the designer and year, i also need to try and remove the yellowing on top i guess it may be a coating on the marble that has yellowed?
It screams italian or French late 60's 70s early 80s to me, the person i bought it off tried to tell me it was a Florence Knoll but i didn't think it was their style. I cant make out the stamp underneath
Note the legs are two tone, like steel and gold/chrome
Thanks for any help!

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