Alex Benjamin
Subscriber
An interesting photo, because it's called a self-portrait:
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But it's not the typical one. It's not in a mirror. If it's using a tripod, it's a strange setting for one. Also, it would be a miracle to get that kind of focus using a tripod to take a self-portrait up-close like that.
I don't see how it can be a self-portrait.
This is quite the mystery.
If it is a self portrait, it breaks all the known patterns. If you look at the self-portrait gallery in the Maloof collection, you see that all of them, safe one, are either mirror reflections, or shots of her shadow. Clearly, without going into deep psychoanalysis, this is what "self-portrait" meant to her: reflection or shadow.
As for gear, I've seen very few in the posted self-portrats that aren't with the Rollei.

Self-Portraits | Vivian Maier Photographer
Self Portraits Portfolio: As reclusive and private as Vivian Maier was, her self portrait photographs reveal a telling story. Thoughtfully posed, and often innovative, her self as a subject allows a depiction of her as she wants the world to see it.

Interestingly, most of the color self-portraits are with a 35mm camera. This might mean that there was another pattern involved, i.e., 120 for black and white, 35mm for color.
If it's the case (anybody knows?), it would rule out Don's posted photo as a self-portrait: she was out shooting color that day. Unless, of course, she also had the Rollei and let someone else shoot.
There is a Maier book called Self-Portraits, which I don't have. It may hold other, different clues.
I doubt she’d bring kids with her, she was very protective of her alone time. When she clocked out, she clocked out.
Here's a self-portrait (again, a reflection) with the kids. Not the Rollei, but not the Leica either: