Thanks, it is Tritium, just likes the ones on my pistols. Thanks to @Foggy415 for previously posting. Here is link
Post in thread 'What have you done to your 200 Series this week?'
What have you done to your 200 Series this week? - https://forum.ih8mud.com/threads/what-have-you-done-to-your-200-series-this-week.818471/post-15737070
Interesting. Thanks for the link. My dive watch has phosphorescing markers, didn't think it was tritium but could be as well.