Active under this name between 1969 and April 1979.
Established 1969 after renaming the plant activities of Société Phonographique Philips.
Since October 1971, CIDIS was also manufacturing injection moulded 7" records, using embossed printing (as opposed to engraved printing). Such records can usually also be identified by a Made in France on the labels.
CIDIS Louviers lacquer cuts can be identified by "380" in the matrix.
Being a full service provider, they would normally also press the records and print the covers there.
From 1969 to 1975, vinyl LP records pressed in Louviers can be identified by "Made in France" on labels and their characteristic pressing rings: first (simple or double) thin ring of 30 / 34 mm in diameter and a second, elevated thick ring with inner diameter of 86 mm
From 1975, most vinyl LP records with 'CIDIS' in runouts have a ring of 20 mm in diameter and, for now, there is no way to know if they were pressed in Louviers or at sister plant CIDIS, Antony.
There are 3 characters in the runouts, identifying the customer, e.g. ALA = Albatros, ARI = Arion, ATL = Atlantic, BAR = Barclay, CAR = Carrère, CBS = CBS, CHR = Chrysalis, COC = Cosmic Music, DEL = Delphine, ELE = Elektra, ERA = Erato, FON = Fontana, ISL = Island, MER = Mercury, PER = Pergola, PHI = Philips, POL = Polydor, RIE = Riviera, VER = Vertigo, VEV = Verve, VIR = Virgin, WAR = Warner Bros.
For LPs, those 3 characters are not typical of Louviers, they can also be found on LP pressings of the sister plant CIDIS, Antony.
Format, channel and speed of a record can be identified by the following typical Philips matrix characters (e.g. 1F/2F) after the side identifier:
E stands for 7" 45 RPM EP Mono or Stereo.
F stands for 7" 45 RPM Mono.
L stands for 12" 33 1/3 RPM Mono.
M stands for 12" EP 45 RPM Stereo.
R stands for 10" 33 1/3 RPM Mono.
T stands for 7" 33 1/3 RPM Mono.
W stands for 7" 45 RPM Stereo.
Y stands for 12" Stereo (regardless of speed).
Other format identifiers are: PEP (7" EP), PPN (7" 45 RPM), LPR (10" LP Mono), LPL (LP).
LPL 1Y / 2Y is more frequent on LP pressings of sister plant CIDIS, Antony but can also be found on Louviers LP pressings.
Printed By can be added when there is "Imp. C.I.D.I.S. Louviers" on the cover.
Renamed to PolyGram Record Service S.A. PRS, Louviers in May 1979.