signed in ink, dated, annotated '638 CA'Vallesina Mendocino' and numbered C/91/251 (from the edition of 251 in six color variants, there were also 26 artist's proofs in Roman numerals), with the artist's red seals, with the blindstamps of the publisher/printers, Felix Landau, Los Angeles/Studio Quattro, Campalto-Venice, metal imprints by Giorgio Verrati, Venice-Mestre, with margins, framed