The Helium Relief Valve is a small, spring-loaded one-way valve integrated in the watch case that is activated when the differential between the inner and the outside pressure reaches a critical level. As a result, the valve releases the helium, hydrogen and/or other gases used in the breathing gas mix trapped inside the watch case.
‘Super-LumiNova’ is a brand name under which strontium aluminate based non-radioactive and non-toxic photoluminescent or afterglow pigments for illuminating markings on watch dials, hands and bezels, etc. in the dark are marketed. This technology offers up to 10 times better brightness than previous zinc sulphide based materials.