1958-1961, on about thirty album pages, study on the Y&T series n°1142 to 1145 including a collective proof then for each value of the type stamps, imperforates, colour tests, deluxe proofs and FDC documents, in addition a small study of the same kind on the Foucauld stamp n°1191 as well as the Service stamps n°22, 23 and 25 including respectively a signed artist's proof and a collective proof, VG.