Please use "Mastered At" until additional drop downs are created for LCCN field. (e.g.Metalwork LCCN)

Customatrix was a wholly owned subsidiary company of Columbia Records, and CBS, Inc. and produced masters, mothers and stampers for all of the regional pressing plants that were part of Columbia's North American pressing plant operation for the US and Canada
(.Columbia Records Pressing Plant, Terre Haute, Columbia Records Pressing Plant, Pitman, Columbia Records Pressing Plant, Santa Maria, Columbia Records Pressing Plant, Carrollton, GA, Columbia Records Pressing Plant, Bridgeport in the USA) and (Columbia Records of Canada, Ltd., CBS Records Canada Ltd. in Canada)

Since Columbia Records also pressed records for many other major record labels besides Columbia, including Elektra, Reprise Records, A&M Records, Epic, Warner Bros. Records, Harmony (4), Blue Thumb Records, and many more, the Customatrix stamp will be found on those pressings as well.

Identifying the Customatrix stamp in the runout areas on most vinyl pressings from any of Columbia's pressing plants can usually be achieved by locating a small stamped zero "0" often positioned either right before the matrix #, or directly following it. However it should be noted that in many cases, trying to locate the Customatrix stamp can be a rather difficult task, that will require the aid of a good magnification tool and strong lighting conditions.
Often the stamping will be so faint that it looks more like a "C" or a "G" or a "J" or a "D"

Sometimes it's a little bigger, or smaller. The exact design tended to fluctuate over time and vary in subtle ways from plant to plant. Sometimes it will be stamped in random places within the runout area. Anything is possible really, and in some cases the stamping can be so vague that it's just
not possible to detect it at all. Since many contributors overlook this mark when entering the runout data from their copy into the BAOI,

It's a good idea to mention it in the release notes when the marking can't be found. That way others will know it's not just an oversight also it's not necessarily associated with any specific matrix prefix such as XSM,