Ambrosio HHSB fourspoke rear wheel.
Carbon monocoque construction, rim (700c) for tubular tires. Matte black paint. Hub is threaded for screw on freewheels but can be be converted to fixed with a track adaptor. Could even be spaced to be used as a front wheel. Nice wheel for a retro (or budget friendly modern) TT build.
Wheel has been repainted in the past so there's a possibility it's not an Ambrosio manufactured wheel. Haven't found anything similar so far. Still a nice bit of kit.
Asking: 160£ (includes shipping within EU)