pˈæʔn̩ɾᵻd ɪn nˈaɪntiːnhˈʌndɹɪd sˈɪksti sˈɛvən, kˈeɪ sˈɪksti sˈɛvən wʌz pɹɪpˈɛɹd fɔːɹ sˈɪɹiəl pɹədˈʌkʃən ɪn nˈaɪntiːnhˈʌndɹɪd sˈɪksti ˈeɪt wɪððə fˈɜːst ɛksɪbˈɪʃən ʌv pɹˈoʊɾoʊtˌaɪps ɪn ljˈuːɾəmɚ, sloʊvˈiːniə.
Patented in 1967, K67 was prepared for serial production in 1968 with the first exhibition of prototypes in Ljutomer, Slovenia.