Walter Lamb or Kipp Stewart or ??

Procured off the street, this set included the table and 4 chairs. I have seen the table in pictures of Walter Lamb's efforts with Brown Jordan (1960's - note legs, base, etc.) but have only seen this style of chair in pictures of Kipp Stewart's work with Terra. However, the dimensions of the chairs do not match Terra's specifications.

Both Table and Chairs have a very green patina which I think indicates copper tubing and only Lamb worked with copper .. I am looking for any additional information people may have on how to identify the chairs.

Dimensions:
Chairs
33 1/2" H x 20 5/8" W x 25" D

Table
28 H
48 1/2" Diameter

Other than not knowing who or when these pieces were made, I absolutely love the color and comfort when sipping Gin & Tonic's on the deck !