This was the official English version of the Order of Mass from the 1965 Roman Missal, published directly after the Second Vatican Council ended in 1965. This was the English Mass used from 1965 until 1969-70, when Paul VI promulgated the New Order of Mass (Novus Ordo Missae), and imposed it on the Latin Rite (the Novus Ordo is the current normative Mass of the Latin Rite). This interim Mass is much closer to the intended fruit of Vatican II's Sacrosanctum Concilum than the New Mass of 1970. It is essentially the Tridentine Latin Mass in English with minor modifications.
Many rubrical similarities exist between the 1965 Missal and the New Mass of 1970. Obviously, an option for use of the vernacular exists in the 1965. Furthermore, as in the Novus Ordo, it is at the discretion of the celebrant to either face the East ("ad orientem") or the people ("versus ad populum"). An option for concelebration was also introduced in the 1965 (this was formerly restricted to Ordination Masses). The required Mass vestments were also simplified (e.g., optionality of the maniple). In 1967, the cope was supressed in the Asperges (rite of aspersion at High Mass). The chasuble was worn in its stead. The Canon was still required to be read in Latin until 1967, when it was permitted in the vernacular. In the 1965 Missal, the priest, when administering Communion, says "the Body of Christ" (or "Corpus Christi") instead of "Corpus + Domini nostri Jesu Christi custodiat animam tuam ad vitam aeternam" (that is, "May the Body + of our Lord Jesus Christ bring thy soul unto life everlasting").
Options for congregational singing also exist in the 1965, exactly as they do in the Novus Ordo -- with places for processional, offertory, communion, and recessional hymns. The 1965 also allows for the Prayer of the Faithful after the Creed. The prayers at the foot of the altar, in addition to being made entirely optional, were shortened (as they would previously be prayed at Requiem Masses). The Last Gospel was suppressed. The calendar follows the Tridentine Ordo, consistent with that of the previous Missal (Missale Romanum 1962). Ironically enough, the New St. Joseph's Missal ends the Liturgical Calendar in 1970.
As is clearly evident, the 1965 Missal more than accomplished all of the goals of Sacrosanctum Concilium and the Second Vatican Council. The promulgation of a New Order of Mass was unnecessary.
The full English text is available here.
I must say it does leave me with some what ifs..... What if the Novus Ordo had never been introduced? What influence would this have had upon the whole liturgical movement? What would the revised Lutheran rites of the late 1960s and 1970s look like today? What impact might this have had upon the decline of attendance common today among Roman Catholics? Where might we Lutherans be today without the influence of the Novus Ordo? Oh, well, one can never go back in time.... but it does seem that we have been somewhat enslaved to liturgiologists whose interest in the liturgy was, well, less than pastoral. It is for this reason that I am grateful for the more deliberate pace of the Missouri Synod. Certainly among Lutherans today, the Lutheran Service Book is a distinctly more conservative book (conservative in the sense of conserving what was received) than, say, the ELCA book, Evangelical Lutheran Worship. While some lament that too much was changed and others lament that Missouri derailed the goal of all Lutherans (well, most, anyway) in the same book, the two books reflect the divergent courses in the two church bodies. Anyway back to the issue... There was a great deal going on under the surface of Roman Catholicism that cannot simply be blamed on Vatican II and some of that had great influence upon churches not in communion with the Bishop of Rome...