Pressed By Capitol Records Pressing Plant, Scranton
Pressed By Capitol Records Pressing Plant, Winchester
According to this data - both Scranton and Winchester are represented on the disc. I would say that one of the plant's (Scranton or Winchester) actually pressed, and one plant supplied the plates to the other plant (or even one plant pressed and the other mastered). On the [l313252] and [l313656] pages. It says there:

began phasing out pressing vinyl at Winchester plant in favor of transferring operations to the Scranton plant in 1969 and stopped vinyl pressing July 1973. Maybe this specific pressing was being created during the transitional period from Scranton to Winchester and it is was actually pressed at Winchester with Scranton plates?

© 1968 Time Inc. All Rights Reserved; The Lp's are automatic sequenced; Issued in a boxed set with a pull out tray; Includes:
A listener's guide to the recordings (40pg) and booklet (60pg col. illus.) by Henry Anatole Grunwald and the editors of Time-Life; Records inserted in slipcase
Matrix / Runout: STL-1-141-A1 IAM [in triangle] —◁ (IAM partially scratched out)
Matrix / Runout: STL-8-141-F8 .—◁
Matrix / Runout: STL-2-141-F20 #3 .—◁ MASTERED BY CAPITTOL
Matrix / Runout: STL-7-141-J12 .—◁ JM MASTERED BY CAPITTOL
Matrix / Runout: STL-3-141-H21 #2 .—◁ KP MASTERED BY CAPITTOL
Matrix / Runout: STL-6-141-J14 .—◁ KP MASTERED BY CAPITTOL
Matrix / Runout: STL.4.141.A14 IAM [in triangle]
Matrix / Runout: STL-5-141-F16 —◁