Colgems Records
Matrix Codes

Thanks to W.B. at Discogs for this information.

Matrix codes are assigned to each song
and appear on the labels & dead wax for each release.

Example: TZRS-4689--1S

(The '--1S' is the stamper number and
reflects part of the manufacturing process)

 

For the Monkees, these are the relevant facts:

 

1st Character: Year

T - 1966
U - 1967
W - 1968
X - 1969
Z - 1970

 

2nd Character: Label Designation

N - Promotional
P - Popular
Z - Colgems

 

3rd Character: Size & Speed

K - 7" 45 RPM
L - 7" 33 1/3 RPM
R - 12" 33 1/3 RPM

 

4th Character: Groove

A - EP Stereo
M - Mono
S - Stereo

 

LPs

 

Little LPs

 

Singles