Before 2007 the line was mainly served by service H (from 1972 to 1979 and again from 1993 to 2007 — then being the all-stop service on this line), and B (from 1979 to 1993).
bᵻfˌoːɹ tˈuː θˈaʊzənd sˈɛvən ðə lˈaɪn wʌz mˈeɪnli sˈɜːvd baɪ sˈɜːvɪs ˈeɪtʃ fɹʌm nˈaɪntiːnhˈʌndɹɪd sˈɛvənti tˈuː tə nˈaɪntiːnhˈʌndɹɪd sˈɛvənti nˈaɪn ænd ɐɡˈɛn fɹʌm nˈaɪntiːnhˈʌndɹɪd nˈaɪnti θɹˈiː tə tˈuː θˈaʊzənd sˈɛvən — ðˈɛn bˌiːɪŋ ðɪ ˈɔːlstˈɑːp sˈɜːvɪs ˌɔn ðɪs lˈaɪn, ænd bˈiː fɹʌm nˈaɪntiːnhˈʌndɹɪd sˈɛvənti nˈaɪn tə nˈaɪntiːnhˈʌndɹɪd nˈaɪnti θɹˈiː.