ATCO Records started life as a sub-label of Atlantic Records. In the early 1990s, the label was folded into the start-up East West Records America under the aegis of label president Sylvia Rhone. However, when Rhone was named the head of Elektra Records in 1995, she took East West America with her to the new label and ATCO was a temporary subsidiary of that label, although it released no new titles.
In 2004, Elektra Records was shut down shortly after Warner Music was sold to a consortium of private investors led by billionaire Edgar Bronfman Jr. In 2008, however, a new ATCO Records emerged, this time a subsidiary of Rhino Records, Warner Music’s reissue label, and new titles were released. These titles are often 'reproductions' using the original label as a 'touch of authenticity' - a Scorpio Music, Inc. sticker often present.
From January 1967, Atlantic Labels - inc ATCO - had their pressing plant codes added to the Master numbers on Labels. The various pressing plants also had their labels printed up at different sources. So, invariably, the Label radius print (or press ref) can vary from one to another issue. This scenario lasted until the end of 1968, at which point the Company established a set 'radius print standard' and all plants complied (with the exception of Shelly Products).
Early labels had the mastering date prefixing the mastering code on Labels (e.g. 67C-11683-BW which is 1967. The suffix is 'Bestway'. See Example)
The pressing plants and their codes (please check link pages for fuller info);
AR: Allied Record Company, Los Angeles, California - Allied Record Company
AM: (on labels) American Record Pressing Co., Owosso, Michigan, USA - American Record Pressing Co. (ARP runout stamp)
BW: Bestway Products Inc., Mountainside, New Jersey - Bestway Products Inc. (19 label ID)
CL, CT or no code: Columbia, Terre Haute, Indiana - Columbia Records Pressing Plant, Terre Haute (73 label ID)
CP or P: Columbia Records Pressing Plant, Pitman, New Jersey - Columbia Records Pressing Plant, Pitman (56 label ID)
W: (on labels) Columbia Records Pressing Plant, Carrollton, Georgia - Columbia Records Pressing Plant, Carrollton, GA (G likely in lacquers)
(W: In runouts, pre-mid '80s, can relate to H.V. Waddell Co. H.V. Waddell Co.)
LY: Shelly Products, Huntington Station, New York - Shelley Products
MG: MGM Records Division, Bloomfield, New Jersey - MGM Records Division
MO: Monarch Records, Los Angeles, California - Monarch Record Mfg. Co.
PL: Plastic Products, Memphis, Tennessee - Plastic Products
PR: Presswell Company, Ancora, New Jersey - Presswell
RI: PRC Recording Industry Products, Richmond, Indiana - PRC Recording Company, Richmond, IN (72 label ID)
S or Ƨ: In runouts, Columbia Rec Prod, Santa Maria, CA - Columbia Records Pressing Plant, Santa Maria. PAL & PBL side prefixes. (25 label ID)
SP: Specialty Products, Olyphant, Pennsylvania - Specialty Records Corporation (49 label ID)