In recent years feminist movements have increasingly employed the form and rhetoric of strikes in framing their protests. The rise of the women’s strike movement has been seen as an indicator of an invigorated wave of feminist activism that focuses, to a greater extent, on structural economic injustices. The aim of this article is to provide a historical aspect to the growing research on strikes as a multifaceted form of protest. The article analyses articulations of collective identity, solidarity, and sisterhood in two different kinds of ‘women’s strikes’ that took place in the Nordic region during the mid-1970s; the ASAB cleaners’ strikes in Sweden during 1974–1975 and the Icelandic Women’s Day Off that took place on October 24, 1975. The article explores how the relationship between gender and class was conceptualized by participants, organizers, and bystanders. We employ these cases to study how solidarity and sisterhood across differences among women might have appeared in practice while at the same time reflecting internal tensions and varying interests. Moreover, the article reflects on the specific form of the strikes and the potential impact their respective form might have had on the political articulations that came out of them.