Common stories of second-wave feminism equate the period either explicitly or by reference to its presumed biological essentialism, with trans-exclusionary feminism. This article deep-dives into issues published between 1977 and 1979 of the Journal of Male Feminism, an underground newsletter for a predominantly North American-based male-to-female (M-T-F) cross-dressing community. It argues that these texts contain a rich set of theoretical resources and nuanced perspectives on sex and gender developed by trans people in the 1970s and therefore deserve to be read as part of an expanded canon of second-wave feminism.