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Solubility data for He and Ne isotopes are taken from Weiss (1970) [12] and from Benson and Krause (1980) [13].

The atmospheric excess [He excess, provided that the latter is exclusively of an atmospheric origin.

Data adapted with permission from “Omega Speedmaster Evolution” by Roman Hartmann.

Introduction Both tritium and helium isotopes have been used as environmental tracers of groundwater flow in a variety of hydrogeologic settings.The He samples collected in 2001 and measured by the Bremen Mass Spectrometric Facility for the measurement of helium isotopes, neon, and tritium in water [9].The groundwater travel times were calculated based on the ratio between tritiogenic helium and tritium [1,8,10,11] according to: ] is determined by the water temperature and the ambient air pressure (altitude) during recharge.It is the same functionality and movement that you’ll find in the gold models of the Replica Rolex Sky-Dweller of course.However, the stainless steel Rolex Sky-Dweller comes with a bit of ‘stealth’ to be honest.