dʒˌeɪˈɛn twˈɛnti fˈaɪv bˈiː wʌz ˌɪntɹədˈuːst ˌɔn wˈʌn dᵻsˈɛmbɚ nˈaɪntiːnhˈʌndɹɪd fˈoːɹɾi, bˌʌt wʌz bɹˈoʊkən ɪmˈiːdɪətli baɪ fˈɛkb æz ðɪ ˈædᵻtˌɪvz wɜː nˌɑːt tʃˈeɪndʒd.
JN-25B was introduced on 1 December 1940, but was broken immediately by FECB as the additives were not changed.