SWISS MADE, SWISS, T SWISS T, SWISS T - < 25, SWISS skive spørsmål

[Edzilla]

Hva er forskjellen på: SWISS MADE, SWISS, T SWISS T, SWISS T - < 25, SWISS skive?
Her er svaret:

“Swiss”
luminous material Radium
used until 1960
radioactive

“Swiss T - < 25”
luminous material Tritium
used from 1960 until 1998
radioactive, radioactivity less than 925 MBq (25 mCi)

“T Swiss T”
luminous material Tritium
used from 1960 until 1998
radioactive, radioactivity less than 277 MBq (7,5 mCi)

“Swiss”
luminous material luminova
used from 1998 until 2000
not radioactive

“Swiss Made”
luminous material Superluminova
used from 2000
not radioactive

 

[Loevhagen]

Flott oppsummering - og som en kuriositet kan det være greit å kjenne til denne: http://en.wikipedia.org/wiki/Radium_Girls

The Radium Girls were female factory workers who contracted radiation poisoning from painting watch dials with glow-in-the-dark paint at the United States Radium factory in Orange, New Jersey, around 1917. The women, who had been told the paint was harmless, ingested deadly amounts of radium by licking their paintbrushes to give them a fine point; some also painted their fingernails and teeth with the glowing substance.