WK-Schallplatten

German vinyl broker/manufacturer, established as Friedrich Knappe, located in Enger (North Rhine-Westphalia). Broker/manufacturing activities ended 2014.

Also known as: Kurt F. Wehmeyer Schallplattenhandel or Kurt Wehmeyer WK-Schallplatten.

The company has worked through agencies for pressings with Da Music, as well as many private and self-released products. WK-Schallplatten is most often not a label name. Only a few releases bear the distinctive tuning fork WK logo.
Private releases through WK-Schallplatten with no obvious label name should be Not On Label.
The in-house WK-Schallplatten label is WK-Records.

Lacquer cutting was done by mastering studios Pauler Acoustics.
DMM cutting was done by Teldec-Press GmbH.
Pressing was usually done by Schallplattenfabrik Pallas GmbH.

Matrix scheme:

WK XX.####-Z or WKY XX.####-Z or WKY.####-Z
Note: separators (dots, spaces, dashes) are used inconsistently, sometimes not used at all.

XX is the vinyl size in cm and Y the format identifier:
"WK 30" = 12" LP
"WKM 30" = 12" Maxi/45
"WK 25" = 10" LP
"WKS" / "WKEP" / "WK EP" = 7" (note: "SPS" may also be for WK)
"WKC" = Cassette
"WKCD" = CD

#### is the sequential numerical code, shared on both sides for vinyl, and consisting of either 3 digits with leading zeroes, or 4 digits.
On vinyl it is sometimes followed by the side number or letter (Z).
On multi-disc releases, each disc has a separate code and side number/letter (if present).

Vinyl
The first known release was in 1973, and the last in 1993. Known job numbers range from 003 to 1760.

CD
As far as is known, the "matrix" scheme was only used as a printed number.
Reissues of previous vinyl releases include the original job number in the matrix.
Known non-reissue matrices start with a job number without prefix, but it is unsure if this is for WK and/or sequential. It ranges from 3577 to 3773.
The first known release was in 1986, and the last in 2013. Known job numbers range from 805 to 882.

Cassette
The "matrix" scheme was only used as a printed number.
The first known release was in 1985. Known job numbers range from 222 to 431.

LCCN use
For matrix/runout numbers, enter as Manufactured By with the sequential code (e.g. WK 30.1276). Please do not include the side identifier (1/2 or A/B).
For printed numbers, if the WK logo is present, enter as label and catalog number. Otherwise, enter it with the printed company role, or Manufactured By if no role is printed.