This is the correct low-domed plexiglass for your vintage Breitling Ref. 1450 chronograph watch. It is 34.50mm in diameter and has a tension ring. It is THE plexiglass you should use if you want your watch to have a perfectly fitting plexiglass and the correct overall look. It is the only plexiglass in the market that will CORRECTLY fit the Ref. 1450, which takes a specific type of plexiglass. In my photos you can see it resting on a Ref. 1450 which we serviced in our store here at Localtime. The listed price is for one plexiglass and does not, of course, include any watch you see in this listing, which is shown for presentation purposes only. Plexis for other vintage Breitling chronographs are listed separately.
Please note that I do not accept returns for parts and feel free to contact me for whatever questions you might have.