Dedicated record collector since 1981; partial towards label variants either from or typeset by Columbia Records' pressing plants in Bridgeport, CT (pre-1964) and Pitman, NJ (1964-86). Also prefer East Coast pressings in general, from RCA Custom in Rockaway, NJ (1954-73), Decca/MCA in Gloversville, NY, Capitol in Scranton, PA, etc.
45's of these sides had matrix prefices, depending on what year recorded, that read RPKM- or SPKM-. Had these been put out on 78, the prefices would have read RPNC- and SPNC-, respectively.
This meant that, in the third and fourth characters as to these recorded:
A = Master Tape - RCA Victor
1 = Recorded in New York
4 = Recorded in Nashville