First appearances of characters whose name contains “Omegatron”"

IssueTitleNotes
1Marvel Feature (1st Series)1st appearance of Omegatron; 1st appearance of Defenders; Death of Yandroth (physical body); Origin of Defenders; Giant-Size; Sub-Mariner reprint
1/AMarvel Feature (1st Series)1st appearance of Omegatron; 1st appearance of Defenders; Death of Yandroth (physical body); Origin of Defenders