The edges of the card had been cut to fit a frame so the photographers info is obscured. That lack of info and her age means dating the card is going to be too hard. She wouldn’t have been going for what the current fashions dictated. So no date for the card. I’m just going to enjoy it for what it is.
Did you notice what is going on at the feet?It looks like a stage with the subject up on the stage and the photographer down on the ground. I wonder if this is one of those travelling photographer studios. In my imagination he takes the side off of his carriage (may be it is a tarp) and inside is the camera, the props and the stairs to get the subjects into the studio. He pulls out the camera, sets up the steps, arranges his props and gets to work. Once he is done, he packs it all up again, hitches up the horses and rides off into the sunset….