I have 4x5 and 6X7 working graphics cameras and the other day loaded up the baby graphic with 120 roll film. By chance I also had my Crown Graphic out. With film pack the baby graphic weighed about the same. I did not weigh them on a scale so this is not a scientific test they seemed about the same weight. I do have a 105mm Nikkor instead of the 103mm that came with baby Graphic and use the 127mm lens on the 4X5.
So for street photography the 4X5 Crown will get taken along and the baby graphic goes back in my display case!