Davosa Argonautic Lumis BS Automatic

Gaseous Tritium Light Sources (GTLS) are located on the indices and hands of the Argonautic Lumis. 
They are particularly safe and guarantee the watch user at least fifteen years of continuous 
illumination – without external power.

Moreover, they glow green in the dark; a color that is particularly easy for the human eye to perceive 
in low light conditions.