I'm on a posting frenzy today. I recently posted how I as able to update the look of my windows by removing some old 60's design elements. Well, today I learned a little more about the old windows. There are a couple of latches on the top sash which when released, appear to allow the top sash to be moved in some way. In what way, I wasn't sure until today. I didn't know if they just allowed the glass to drop or to be completely removed for some reason. This afternoon, I had removed one of the screens to get ready to replace the old screening. While the screen was out, I flipped the levers and the whole top sash tilted out. Not for cleaning, but for airflow. Why you'd use that instead of the lower sash (which has the screen) I don't know, but it's still kind of cool. The few windows I've tried so far move easily and were not painted shut, which surprises me to no end. Considering I don't want bugs in the house, I don't think I'll be using this window feature a whole lot.
Not shown in these pictures is the before & after difference after replacing the old screens. The screen frames were a little different than I had worked on before, but it's not like replacing screens is rocket science. The old screens were gunked up and nasty. The new screens (I used metal instead of the cheaper vinyl screen) almost disappear compared to the old ones.