Luminox Navy SEAL 3080 Chronograph The battery is dead. The original strap keeper broke, so it has been replaced with a similar aftermarket one. I think the chronograph model is quite rare. I used it occasionally only in the summer for the first two years or so, but I have kept it as part of my collection for the past eight years. I don't think I will use it in the future, so I am putting it up for sale. Thank you.