Five unrecorded proof impressions aside the edition of 100. All signed. One trial proof with a dark blue background; One artist proof with a light blue background, one artist proof with a solid black background; one artist proof without background.
One fine and undocumented trial proof, rare image printed in reverse with a black tusche background; unique piece.

Literature: Engberg Banach 35.

The edition of 100 was divided into three groupings printed with different background colors: light blue for the first third, dark blue for the second third, and black for the last third, although no documentation of the exact numbering sequences exists in archival or workshop records. [...].

There are additional color variances in the trial proofs that depart from both the edition and artist's proof impression.