A.R.E.A.C.E.M. stands for "Les Applications & REalisations ACoustiques ElectroMecaniques"
The plant was originally founded as "Usine de Matériel Electroacoustique A.C.E.M. S.A." in 1950.
Renamed to AREACEM S.A. in May 1971 (after merging the distributor AREA S.A. with the pressing plant).
Owned by E.W. Pelgrims de Bigard.
The plant went into receivership early 1980 but became a cooperative after a buyout by the workers and in September 1980 the plant was renamed to Societé Nouvelle AREACEM (better known as SNA).
A.R.E.A. means "Applications et réalisations électriques et acoustiques".
A.C.E.M. means "Ateliers de Constructions Électromécaniques"
AREACEM used special codes (printed on cover) to identify the manufacturing date, e.g. A 9, C 11 etc., where A = 1972, B = 1973, C = 1974 etc. and the number indicating the month, e.g. 9 for September. So, A 9 means September 1972.
⚠Transitional special codes can be found during year 1971, where L-71 probably stands for December 1971
( exemple here: Ennio Morricone - Il Était Une Fois Dans L'Ouest (Bande Originale Du Film))
Note that code could be obsolete when found on a reissue (often copied from the original layout).
ACEM however used figures only, e.g. 11-70 stands for November 1970.
On runouts may appear an AREACEM logo stamp (see images) or a △ symbol. Both mean pressed by AREACEM.