dˈʊɹɹɪŋ ðə nˈaɪntiːnhˈʌndɹɪd sˈɪksti z ænd ˈɜːli nˈaɪntiːnhˈʌndɹɪd sˈɛvənti z, ɐ nˈʌmbɚɹ ʌv dɪvˈɛləpmənts tˈʊk plˈeɪs, ɪn pɚtˈɪkjʊlɚ ðə mˌænjuːfˈæktʃɚɹ ʌv dˈɛmaʊntəbəl bˈɑːks vˈæn bˈɑːdiz, ænd ɹˈɑːbɪnsənz ʌv tʃˈɛstɚfˌiːld wʌzðə fˈɜːst ˈɑːpɚɹˌeɪɾɚ tə plˈeɪs ɐ lˈɑːɹdʒ ˈɔːɹdɚ fɔːɹ ðɪs pɚtˈɪkjʊlɚ tˈaɪp ʌv pɹˈɑːdʌkt.
During the 1960s and early 1970s, a number of developments took place, in particular the manufacture of demountable box van bodies, and Robinsons of Chesterfield was the first operator to place a large order for this particular type of product.