Luminescent watches and how they get their glow

Hey everyone, I know everyone probably already knows all about this, but saw this great article
about luminescent watches, and how different watches get, and have gotten their glow over the
years.

The article not only covers Radium, and Super-Luminova, but even touches on substances like
crushed volcanic material, and shells that were used on watches. On top of that, you still hear
about tritium, LCD displays, back lighting, and Chromalight. Hope that you enjoy.

Here is the article everyone...

http://www.atimelyperspective.com/blog/2016/12/21/luminescent-watches-how-watches-get-their-glow-rolex-tudor-omega-ball-breitling-panerai.html

Just a few pics also...