These are service replacement rings for Breitling 808 or 769 vintage chronographs. They were made by Breitling and supplied to an authorised Breitling repairer which I bought items from a few years ago and now just getting to uncovering these again. If you are missing your ring, or yours is damaged, these will certainly make the watch appear much better. The print quality is excellent, but actually the printing design is not perfectly correct for either model - the 769 had some red lettering on it, and the scale increments decreasing. Outer diameter is 34.4mm and inner diameter is 30mm (approx).
Price is for 1 ring, even though the photo shows 2. The item "Breitling 769 808 bezel insert sliderule tachy ring" is in sale since Friday, June 25, 2021. This item is in the category "Jewellery & Watches\Watches, Parts & Accessories\Parts, Tools & Guides\Parts\Bezels & Inserts".The seller is "dbuddman" and is located in London, London. This item can be shipped worldwide.