77/ 553 Zwart, P. [N.K.F.]. "N223 N224 N226 alle eischen vereenigd in 1 kabel (...)". Advertisement, (±1930), 13,9x11,1 cm., recto w. letterpress text, verso blank, tipped onto brown paper mount along upper margin.

= PROOF. Cf. PZ-129 and Monguzzi p.64 for differently shaped advertisements with a similar text.