First-year pressing

Chicago V 1972 US Pressing (KC 31102)

Runout and matrix codes

Etched or stamped in the dead wax between the last track and the label. If yours match, you have this pressing.

AC 31102Side A Label
BC 31102Side B Label
D \ T P AL-31102-1K o c 5Side A (Variant 1) Stamped (except "D \ T", "5" etched)
o P BL-31102-1AE 1 T D 8Side B (Variant 1) (except "1 T", "8" etched)
P AL-31102-1K o PSide A (Variant 2) Stamped
K TSide A (Variant 2) Etched
o P BL -31102-1AESide B (Variant 2) Stamped
2T ABSide B (Variant 2) Etched
ᴏ P AL 31102-1DSide A (Variant 3) Stamped
ᴩ :T P BL 31102-1E E2BSide B (Variant 3, 9) Stamped
T P AL 31102-1BSide A (Variant 4) Stamped
o P BL-31102-1L 1TSide B (Variant 4) Stamped
T P AL 31102-1DSide A (Variant 5) Stamped
T P BL 31102-1ESide B (Variant 5) Stamped
T \ PAL 31102 IL TML-M oX ESide A, Variant 6, etched; "TML-M and o" stamped
P BL-31102-1ABSide B, Variant 6, stamped