Citizen flyback chronograph

The Citizen 8110 chronograph were launched couple of years after the Seiko, but added 28,800 bph (vs 21,600 bph for the Seiko) and the flyback feature. In terms of modern chronographs, the only chronographs with this combination of construction, features and functions are currently available in watches from the likes of Patek, Audemars Piguet, Blancpain, Franck Muller and Vacheron Constantine. As best as I can tell they are the least expensive, most sophisticated chronographs ever made.