What was the last year Rolex subs had the tritium hands/indices

[ref1655]

Originally Posted by Alpino

. it was stopped during 1997.

so...with a half-life of approximately 12.3 years, is it safe to assume that most Rolexes & other watches with tritium dials/hands will no longer be glowing in the dark by 2020? mine (a 1971 model) stopped glowing about a decade ago.