The 8R28 is part of a large family of movements with various complications. The 6R20, 6R21, 6R24 and 6R27 are all in the same family as the 8R28, it's just the 8R28 has a chronograph on the other side as opposed to stuff like a power reserve.
αυτή είναι σάντουιτς, πατάει πάνω σε αυτές