German cross in gold, collector's item

Pater. [Mainz, Gutenberg Museum and Brussels, Plantin, 1952. Set of 6 volumes in microscopic 5 x 5 mm format: - Le Pater, printed in seven languages (French, English, German, American, Dutch, Swedish, Spanish). Bound in black leather with a gilded cross on the front cover, housed in a silver-plated metal case and Plexiglas box. - The Pater, printed in seven languages (French, English, German, American, Dutch, Swedish, Spanish). Bound in black leather with a gilded cross on the cover, housed in a Plexiglas case. - Ave Maria, printed in Latin. Black leather binding with gilded chalice on front cover, housed in a Plexiglas case. - The Pater, printed in French. Bound in red leather with a gilded cross on the cover, housed in a Plexiglas box and a white plastic case. - The Pater, printed in Italian. Bound in silver-plated metal with embossed cross. - The Pater, printed in 7 languages, paperback. The set comes with : - a small publisher's portfolio with a pocket containing two lead printing dies for text blocks, 6 text and title prints, - a lead printing die for the Vaterunser (Pater in German), in a blue plastic cover from the Gutenberg Museum in Mainz, - a microform on rodhoïd reproducing the 1245 pages of the Holy Bible (773,746 words), to be read only with a 100X microscope, of course! Very good condition. Rare, sought-after microscopic editions.