Catalog numbers
The 60's-70's system
Until the late 70's, Odeon used a number system formed
by a prefix of 3 or 4 letters and a 3 or 4 digits number.
The stereo albums got an "S" as the first letter of the prefix,
and if the album had gatefold cover, a "X" appeared also.
The Beatles albums had an exclusive prefix, BTL (normal cover) and
BTX (gatefold) that started with Rubber Soul (BTL 1001) and
was used also in the solo albums and compilations until 1975.
The albums released before 1966 had the prefix MOFB
(used also for other artists), as well
as the first five original albums released later.
The gatefold codes
for this series were XMOFB and XSMOFB.
The 80's system
In the late 70's, all EMI-Odeon album received new catalog numbers, similar
to those used by the remastered collection. The new codes were formed by
the code "31C" and two groups of digits with 3 and 5-6 digits respectively.
(I guess this is an international EMI system).
The older numbers, although, were kept along with the new ones.
The CD system
It is similar to the remastered collection, but the 31C code was changed
to three-digit numbers. So the CDs are coded "368", the cassettes
"566" and
the LPs "066". These codes changed recently (I suppose when the
Apple label was applied to the entire collection) to
"372" (CD), "270" (Cassette) and "070" (LP), but on CD these prefixes
don't appear.
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