Periscopic (Periscope) Aircraft Sextant – P/N MS 28011-5. Storage case & Cable. I do not see a Bubble, I See RED & GREEN when knob turns. Angle of sight DOES move up and down. Unit is in good visible condition. Review all photos, 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.
