[4] 11 Johnny Valentine August 1973 (NLT) Live event N/A 2 [Note 6] 12 Johnny Powers October 1973 (NLT) Live event N/A 2 [Note 7] Powers took the title to Japan for a tour with New Japan Pro Wrestling 13 Antonio Inoki December 10, 1973 World Title Challenge Series Tokyo, Japan 1 429 [5] — Vacated February 12, 1975 — — — — Inoki vacated the title as refusal of an NWF ordered defense against Tiger Jeet Singh.