Soft-ground etching and aquatint in colors. Not in the Scottish Arts Council. Signed, dated and numbered 21/60. On wove paper by BFK Rives (with watermark). 68 x 54 cm (26,7 x 21,2 in). Sheet: 90,5 x 75 cm (35,6 x 29,5 in). Published by Petersburg Press, London. Celia Birtwell was the wife of Hockney's good friend, the fashion designer Ossie Clark. Both were celebrities of the London fashion scene in the 1970s. The textile designer Celia was Hockney's model for numerous works. [DB].