- Two Tunnels
- Catalogue raisonné no. P32
- Ingrams and Halliwell no. 031
- 1968
- Screenprint in colours with diecut Mylar
- Numbered from the edition of 75.
An additional 10 artist's proofs numbered in Roman numerals - Signed in pencil
- Titled and dated in pencil
- Published by the artist, with his blindstamp
- Printed on smooth white paper by the artist