I've had this watch for about 20 years now. I can't remember the model number and there is nothing on the back saying what it is. I think it may be a P6500. Had it serviced at Traser about 10 years ago. It runs beautifuly still. Unfortunately the tritium tubes are not nearly as bright as they were. I believe the half life of tritium is 10 years so that would make the output around 25% now? I'm guessing and not sure if I got that right. You can still see the lume once your eyes are adjusted to the dark. Despite this I think it's still a lovely watch. It has a Citizen Ecodrive strap fitted which I think goes rather well. I'm thinking about getting another so I thought I would post this in the hope that others may care to show pictures of the models they have.
[IMG]https://i.imgur.com/3Y4wMkWl.jpg[/IMG]
An ultra violet torch shows the lume in it's former glory but unfortunately it doesn't actualy charge the tubes.
[IMG]https://i.imgur.com/z5qkCBnl.jpg[/IMG]