5 generation 1969–1973 3.7 AT 1969 → 3.7 MT 1969 → 5.2 AT 1969 → 5.2 MT 1969 → 5.9 AT 1969 → 6.3 AT 1969 → 6.3 MT 1969 → 6.6 AT 1969 → 7.2 AT 1969 →