Inherited Eames Chairs

I recently inherited a set of 4 Fiberglass armchairs from my parents. They have been in the family since the early to mid 1950’s. The 4 colors are Salmon, Seafoam, Black and White. A note that accompanied the chairs said that they are Eames Armchairs. They are mounted on an X-base with round hard rubber shocks.

They are very similar to the Eames Zenith Fiberglass Arm Chair in size, material and color, with the exception of the backs. They are higher and squared.

Could not find any photos of this style. Can anyone tell me what I really have.