Just picked up a beige dial Vietnam era Orsa military style watch.  I really like this one, but I am wondering about the lume on the hands and face.  The lume seems to dim greatly after just a short amount of time.  I only have one other watch with lume and it is a Traser with tritium so I know my point of view is a little skewed, but I was wondering what is considered normal on this watch in terms of lume brightness and duration.

Really bright at first.  In fact, bright than my Traser, but that does not last long.

Anyone with experience on this watch? What is normal?  Do I need a relume?  Where can I get a relume?

Thanks