Matty01
·Not sure with this one
Something to do with tritium and radon both being widely understood to have been used in the watchmaking process Uranium is not (even though all 3 are related and uranium has been used in watchmaking processes)
Something to do with tritium and radon both being widely understood to have been used in the watchmaking process Uranium is not (even though all 3 are related and uranium has been used in watchmaking processes)


















