Periscopic (Periscope) Aircraft Sextant – P/N MS 28011-5. Storage case & Cable. ALL SEEMS TO BE WORKING. THESE ARE THE THINGS I CHECKED. There is a Bubble, I See red, green & clear when knob turns, hear timer, angle of sight moves up and down. Unit is in good visible condition. They are Actual Pictures. Thank you for shopping our store. We do our best to make all sales smooth. Please us know if there are any issues. We can’t fix things we do not know about. Thank You For Shopping With Us.