US
1979- Label and catalog number
- Columbia JC 35342
- Format
- LP, Album
- Runout / matrix
AL 35342-1B PVariant 1 Side A runout, stamped
A 3Variant 1 Side A runout, etched
BL 35342-1A PVariant 1 Side B runout, stamped
L 2Variant 1 Side B runout, etched
Vinyl pressings
by Duke Ellington · 1979
Unknown Session was first pressed on vinyl in 1979. Every vinyl pressing is listed below with its label, catalog number and runout codes, so you can tell an original from a reissue.
6 pressings came out in 1979, the album's first year, in 3 countries. Compare the label and catalog number on your copy, then the codes etched or stamped in the runout groove (the dead wax around the label): they are the surest sign of an early pressing.
AL 35342-1B PVariant 1 Side A runout, stamped
A 3Variant 1 Side A runout, etched
BL 35342-1A PVariant 1 Side B runout, stamped
L 2Variant 1 Side B runout, etched
AL 35342-1A PSide A runout, mostly stamped
BL 35342-1F ASide B runout, mostly stamped
AL 35342Side A label
BL 35342Side B label
AL 35342-1ASide A runout, variant 1
BL 35342-1ASide B runout, variant 1
AL 35342-1A P CSide A runout, variant 2
BL 35342-1A P DSide B runout, variant 2
AL 35342-1A X P XT D7Side A runout
P BL 35342-1E P XT A2Side B runout
AL 35342Side A label
BL 35342Side B label
Not sure how to read the runout? See matrix numbers, runout and dead wax and how to tell a first pressing.
By decade, oldest first. Open a pressing for its full label, barcode and runout details.
| Year | Country | Label and catalog number | Format |
|---|---|---|---|
| 1979 | Brazil | CBS 225034 / Discos CBS 225034First yearLP, Album | LP, Album |
| 1979 | Europe | CBS 82819 / CBS CBS 82819First yearLP, Album | LP, Album |
| 1979 | UK | CBS S CBS 82819LP, Album, Reissue | LP, Album, Reissue |
| 1979 | US | Columbia JC 35342 / Columbia 35342First yearLP, Album, Promo, Stereo · Promo | LP, Album, Promo, Stereo · Promo |
| 1979 | US | Columbia JC 35342First yearLP, Album | LP, Album |
| 1979 | US | Columbia JC 35342First yearLP, Album | LP, Album |
| 1979 | US | Columbia JC 35342 / Columbia 35342First yearLP, Album, Promo, Stereo · Promo | LP, Album, Promo, Stereo · Promo |
| Year | Country | Label and catalog number | Format |
|---|---|---|---|
| 1980 | Japan | CBS/Sony 20AP 1801LP, Album | LP, Album |
| 1985 | Australia | CBS LJ 19LP, Album | LP, Album |
| 1985 | Europe | CBS CBS 21130LP, Album, Reissue, Stereo | LP, Album, Reissue, Stereo |
| 1985 | Spain | CBS CBS 21130LP | LP |
| 1987 | Canada | A&A CSPS 3037LP, Album, Reissue, Stereo | LP, Album, Reissue, Stereo |
12 vinyl pressings of Unknown Session are listed here, from 8 countries, released between 1979 and 1987.
The earliest pressings are from 1979, in US, Brazil, Europe. One of them is Columbia JC 35342.
Check the catalog number on the label (first-year pressings use JC 35342, 225034, 82819) and the codes etched in the runout groove, then compare them with the pressings listed above; for example, AL 35342-1B P and A 3. Later reissues often keep the catalog number but change the label design or the runout codes.
It depends on which pressing you have and on the condition of the record and its sleeve. Early pressings from the album's home country in near mint condition are usually worth the most; common later reissues are worth far less. Scan your copy with VinylLens to see its value for every grade.

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