Philaposte’s €16 block pairs four €4 designs with a history of the TD6 rotary intaglio press. Built by Chambon for the stamp printing works and introduced in 1960, the six-colour press combined direct and transferred intaglio. Presses installed at Boulazac from 1970 printed definitive designs including the Marianne de Béquet, Sabine and Liberté de Gandon and the bicentenary Marianne.

Louis Boursier designed the 160 × 110 mm block using Philaposte photographs. Its four stamps show the receiver, numbering unit, intaglio printing and engraved cylinder. Gold foil highlights the title and selected details. Philaposte planned 35,000 blocks and a salon preview on 5–7 November, followed by wider sale on 9 November. Scanning the block in Phil’appli opens an animation of the printing process.