The first two below are in a private collection. I still have the last two and the etching. Photos are not good but you can come and see the actual works if interested.
Sofa Series 1: Maya Clothed. NdA 1965.
Sofa Series 2: Maya Nude. NdA 1966
Sofa Series 3: Paternal. NdA 1966
Sofa Series 4: Maternal. NdA 1966
The Sofa. Etching A/P 1. NdA 1970. Image size: 27.5cm x 22cm (11 x 9 inches) Sheet size: 42 x 57cm (22.5 x 16.5 inches)