bᵻtwˌiːn nˈaɪntiːnhˈʌndɹɪd sˈɪksti nˈaɪn ænd nˈaɪntiːnhˈʌndɹɪd sˈɛvənti sˈɪks ɐ tˈoʊɾəl ʌv sˈɛvənti fˈoːɹ wɜː bˈɪlt, wɪððə lˈæst ʌv ðɪs klˈæs tˈeɪkən ˌaʊɾəv sˈɜːvɪs ɪn tˈuː θˈaʊzənd sˈɛvən.
Between 1969 and 1976 a total of 74 were built, with the last of this class taken out of service in 2007.