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Markings Information:
"T SWISS MADE T" indicates that the radioactive material Tritium is present on the wristwatch. The amount of radioactive material emitted is a maximum of 25 milliCurie.
"SWISS T < 25" more specifically indicates that the wristwatch emits an amount of Tritium that is less than the 25 milliCurie limit.
"SWISS T 25" indicates that the wristwatch emits the maximum allowable amount of Tritium at a full 25 milliCurie.
"Swiss" and "Swiss Made" are now used for Luminova, but were previously used for Radium dials prior to ~1960
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