The syllabical Linear B, a script that was used by the Mycenaean Greeks from the 16th century BCE, had 87 symbols, including five vowels.
ðə sɪlˈæbɪkəl lˈɪnɪɹ bˈiː, ɐ skɹˈɪpt ðæt wʌz jˈuːzd baɪ ðə mˌaɪsənˈiən ɡɹˈiːks fɹʌmðə sˈɪkstiːnθ sˈɛntʃɚɹi bˌiːsˌiːˈiː, hæd ˈeɪɾi sˈɛvən sˈɪmbəlz, ɪŋklˈuːdɪŋ fˈaɪv vˈaʊəlz.