It occurred to me that I have a book that might explain this: “Matters Liturgical”, a translation of the “Collectio Reum Liturgicarum” by Rev. Joseph Wuest, C.SS.R, first published in 1889.; translated by Rev. Thomas Mullaney, C.SS.R.; re-arranged and enlarged by Rev. William Barry, C.SS.R., S.S.L. My eight edition of the English edition was published in 1955.
From the Third Part, Sacred Rites: The Mass, The Parts of the Mass, 240 The Ablutions:
c) “If a priest celebrates two or three Masses on the same day but not in immediate succession, he shall take the wine of the first ablution and the wine and water of the second ablution at the last Mass only. At the preceding Mass or Masses he can take the two ablutions in the usual way and saying the usual prayers, except that only water may be used for each ablution (PIUS XII: CONST. OF JAN. 6, 1953 AD IV; HOLY OFFICE: INSTR. OF JAN. 6 1953 AD 7;…)”.
There were simplified rubrics introduced in 1960, which were incorporated in the 1962 Roman Missal. Perhaps the above instruction was modified by these, but I really don’t know. The 1960 rubrics were in affect when I began serving but we were trained by older priests who often retained their old habits.