I am having trouble finding the manufacturer. I know it's from the 50s or 60s, and that it's not an original Saarinen (the top of the tulip base is a square with four screws into the table top).
Maurice Burke designed tables were produced by Arkana in Bath, UK. They will be stamped underneath the base. The edge of the table doesn't look like Arkana to me, they taper in more like the Knoll tables.