How would you describe the cartoon character Nancy's hairdo?

I hadn’t seen a Nancy comic strip for years, but I saw one the other day. This is Nancy.

I remember looking at that comic strip when I was a kid and I could never figure out her hair style. It kind of looks like she’s got little spikes, but other times I wondered if it was supposed to be like an Afro, and other times it kind of seemed like maybe her head was shaved, but none of those hairdos seem to fit a seemingly Caucasian-looking girl of the time period (1930’s).

Any ideas? Links to photos of people with Nancy’s hairdo would be helpful.