ðə nˈʌmbɚɹ ɪz bˈeɪst ɔnðə jˈɪɹ ʌv ˌɪntɹədˈʌkʃən fɹʌmðə faʊndˈeɪʃən ʌvðə kˈʌmpəni—ðə kˈʌstəm sˈɛvənti fˈoːɹ wʌz ˌɪntɹədˈuːst ɪn nˈaɪntiːnhˈʌndɹɪd nˈaɪnti tˈuː fɔːɹ mˈɑːdəlz wɪð tˈuː dˈɪdʒɪts, wˌaɪl ðə θˈɜːd dˈɪdʒɪt ˌɔn mˈɑːdəlz wɪð θɹˈiː dˈɪdʒɪts ɹˌɛpɹᵻzˈɛnts ɐ lˈɪst pɹˈaɪs wɛn mˌʌltɪplˈaɪd baɪ jˈɛn tˈɛn,zˈiəɹoʊzˈiəɹoʊ zˈiəɹoʊ ðə kˈʌstəm ˈeɪthˈʌndɹɪd twˈɛnti θɹˈiː wʌz ˌɪntɹədˈuːst ɪn tˈuː θˈaʊzənd ænd kˈɔst jˈɛn θˈɜːɾi,zˈiəɹoʊzˈiəɹoʊ zˈiəɹoʊ æt ðə tˈaɪm ʌv ˌɪntɹədˈʌkʃən.
The number is based on the year of introduction (from the foundation of the company—the Custom 74 was introduced in 1992) for models with two digits, while the third digit on models with three digits represents a list price when multiplied by ¥10,000 (the Custom 823 was introduced in 2000 and cost ¥30,000 at the time of introduction).