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W.B of New York, on Hoffman Forums:
(LIST OF US PRESSING PLANTS ACTIVE ’60s ’70s)
Among the other plants used by Polydor (for both LP’s and 45’s) in that period included:
– Columbia Record Productions, Pitman, NJ (56) and Terre Haute, IN (73) (their Santa Maria, CA plant  handled pressings for them in the late 1970’s)
– Philips/PRC Recording Corp., Richmond, IN (72) (also, after late 1970’s, Compton, CA )
– Capitol Custom Pressings, Scranton, PA (to late 1973) and Winchester, VA (I saw a copy of a 45 of James Brown’s “Sexy, Sexy, Sexy,” PD-14194, pressed there)
– North American Music Industries, Scranton, PA (plant spun off in late 1973 from Capitol)
– Shelley Products, Huntington Station, NY (54) (by this time, their “pop-off” 45 labels were but a thing of the past)
– Sonic Recording Products/Goldisc Record Mfg., Holbrook, NY (16) (typesetting on early 1970’s pressings from Progressive Label Co., Brooklyn, NY)
– Specialty Records Corp., Olyphant, PA (49)
– Hauppauge Record Mfg. (ex Keel Mfg.), Hauppauge, NY
– Bestway Products, Mountainside, NJ (19)
– Presswell Records Mfg. Co., Ancora, NJ (18)
– RCA Custom Records, Indianapolis, IN (70)
– Allied Record Co., Los Angeles, CA (22)
– Plastic Products Co., Memphis, TN (30)
Incidentally, their code for Monarch was (24)
The numbers in parentheses or brackets are the known codes used by PolyGram beginning in 1979 to indicate which plant was pressing for them.
As of 1974, Polydor LP’s were pressed by at least three plants – All Disc Records in Roselle, NJ (such pressings, with label copy typesetting from Progressive Label Co. in Brooklyn, NY, have a “6” right below the European xxxx xxx number on the label),
PRC Recording Corp. in Richmond, IN, and Monarch Record Mfg. Co. in Los Angeles. (All Disc and PRC pressings used uncoated paper stock for the labels, but their typesetting differed considerably.)
Can’t say about the former Capitol plant in Scranton, PA which by then was now owned by North American Music Industries of Pittsburgh; but selected “record club” copies were pressed by Columbia. I can’t vouch for what the “33” stood for on the deadwax, but generally the PolyGram pressing plant number designations were not written on the deadwax, only (after 1979) on the labels.
Keel Mfg. Corp.
Defunct Long Island record manufacturer/pressing facility which was located in Hauppauge, NY (USA). A division of Pickwick International, Inc., they at one time produced more than 25 million records per year and were also known as K. M. Corp., K.M. Corporation, Keel Manufacturing, Inc. (“Keel”), KEEL Manufacturing Corp., and Keel Manufacturing Division. Keel sourced nickel electroplated masters from Mastercraft Record Plating, Inc., and vinyl plastic compounds from Woodbridge. The company lasted until mid 1981 when it became Hauppauge Record Manufacturing Ltd..
10 & 15 Gilpin Ave
Hauppauge NY, 11788