Collection: IMP​

[bPlease don't use prior to 1984[/b.
French printing division of Polygram, credited "Imp. Polygram" after [l268474 headquarters were transferred from Louviers to Antony in 1984.
Also often credited by the same two waves, stamped/embossed at the bottom of the rear cover.
If printed "Imp. Polygram Industries Messageries", please use [l268474.

The "Imp. Polygram" print seems to have disappeared in 1987. It could stand for the printing stopped after the renaming from [l268474 to [l358093 in 1986.