This is the correctly domed plexiglass for Navitimer Ref. 806 and Cosmonaute Ref. 809 vintage chronographs. All sizes fit both models (they will even fit some Cal.7740 or Cal. 11/12 Chronomat models with 7808 or 8808 cases), as both models use the same case. There is sometimes a small difference in the size, depending on the bezel (different bezels were used in different production years). It is THE plexiglass you should use if you want to be able to read your watch’s outer sliderule scale. It is the only plexi glass in the market that will CORRECTLY fit a Navi or Cossy which take a specific type of plexiglass. In my photos you can see it resting on a Navitimer Ref. 806 which we serviced in our Spa. The price is for one plexi glass and does not, of course, include any watch you see in this listing. Please note that I do not accept returns for parts.
Feel free to contact us for whatever questions you might have.