ðeɪ ɪŋkɹˈiːst ðə nˈʌmbɚɹ ʌv ɹˈɛkɚdz fɹʌm fˈɪfti tə wˈʌnhˈʌndɹɪd ɪn nˈaɪntiːnhˈʌndɹɪd fˈɪfti fˈaɪv, ᵻvˈɛntʃuːəli sˈɛɾəlɪŋ ˌɔn fˈɪfti ɔːɹ ˈeɪɾi pɜː məʃˈiːn ˈæftɚ nˈaɪntiːnhˈʌndɹɪd fˈɪfti ˈeɪt.
They increased the number of records from 50 to 100 in 1955, eventually settling on 50 or 80 per machine after 1958.