The Sixties Square Chronograph first appeared in 2009, inspired by the iconic look of the 1960's. Glashütte Original then released more options in 2017, featuring unique dial colors and finishes, reminiscent of the round Sixties models from the past. One of these new versions is the Reference 1-39-34-23-32-04, sporting a stunning dégradé green dial with a sunburst texture.