Around label perimeter - MADE IN GERMANY * DEUTSCHE GRAMMOPHON GES.MBH * REGD TR M - ALLE HERSTELLER UND URHEBERRECHTE VORBEHALTEN: ÜBERSPIELUNG, ÖFFENTLICHE AUFFÜHRUNG UND RUNDFUNKSENDUNG VERBOTEN
Below centre hole (label) - album title, song title, songwriter credits, artist
Centre left (label) – C.C or BIEM / C.C., Made in Holland
Centre right (label) – Diamond (symbol for needle of the pick-up head of a record player), M (Microgroove), 33 (speed 33 1/3 rpm), catalog / matrix no., side identifier
Matrix (runout) – stamp A Side: C AA 007 1Y 1 670 115 or 2/2
Matrix (runout) - stamp B Side: C AA 007 2Y 1 670 114 or 1.1
C - unknown
AA - Pressed for a company (Polydor B.V. Netherlands) of Grammophon-Philips Group
007 - matrix number
1 or 2 - side identifier
Y - format 12' stereo
1 – negative record (father) out of the first lacquer cut used
670 - Lacquer cut at Phonodisc B.V. Baarn, Netherlands
The M in the 33 triagle doesn't mean mono,see here.
M stands for Microgroove, so this record should be played with a (flip-over) cartridge in M position and not in N (normal groove, for 78 rpm records).
Stereo singles appeared directly from the start of the Stereo Era, in 1958 Here is one a year after.
Popular music was mostly played by young people on monaural record players, so there was no use to release them as stereophonic records.