Seiko Prospex LX Spring Drive Professional SNR031J SNR031J1 SNR031J Automatic 300M Men's WatchSeiko Prospex LX Spring Drive Professional SNR031J SNR031J1 SNR031J Automatic 300M Men's Watch The Prospex LX denotes the way light is reflected subtly on the broad, flat surfaces of the case despite its black finish laid by Physical Vapour Deposition (PVD) technique. It has been, thus named, following the Latin word for light or brightness. Developed in collaboration with Ken Okuyama Design, it is a high profile product showcasing special