ðə mˈɑːdəl tˈuː θˈaʊzənd θɹˈiːhˈʌndɹɪd fˈɪfti wˈʌn ˌeɪˈɛf ˈædᵻd sˈɪksti fˈɪkst hˈɛdz twˈɛnti sˈɜːfɪsᵻz tˈaɪmz θɹˈiː sˈɪlɪndɚz fɔːɹ ˈæksɛs tʊ ɐ sˈɛpɹət ˈɛɹiə ʌv wˈʌn.sˈɛvən ˌɛmbˈiː.
The model 2351AF added 60 fixed heads (20 surfaces × 3 cylinders) for access to a separate area of 1.7 MB.