Photos of an alleged Apple Watch Series 10 prototype with a unique health sensor design were shared by @StellaFudge.The prototype features a smaller array of LEDs for the health sensor compared to the actual Apple Watch Series 10 models released last year.There is an extra ring of lights around the sensor's perimeter, but its purpose is unclear.The prototype was running an unreleased build of watchOS 11.1, indicating Apple's testing of future health features for the Apple Watch.