It is equipped with Caliber 5R66, a Spring Drive movement with a GMT function that proved its performance in space.
Spring Drive’s natural glide motion of the seconds hand around the watch dial evokes the scene of a spaceship navigating in the silence of outer space.
The case back is marked with the letters "LIMITED EDITION" and a serial number between 001/400 and 400/400 as a certificate of limited quantity.
*In an actual product, the case back direction might be different from the photograph.