What year and what mm watch.

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Hello good evening All,
First off, thank you so much for having me!

I wonder if anyone could help me please.
I recently came into possession of an Omega Seamaster 300M (model 2541.80.00), and I’m trying to find out a bit more about it—like what year it might be from and the mm size. I’ve attached a picture with the serial number and model number included. My late father told me it’s a 36mm watch, but it looks much bigger to me. Any help would be greatly appreciated! I’m a stroke survivor, so I struggle a little with numbers, but I hope I’ve got everything above correct. If you need more info, please let me know. Thank you so much for any assistance you can offer!
kind Regards
Darius
Veteran.

 
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That is a 41mm watch. Omega’s web site has a page dedicated to that model. Based on the use of Super-Luminova rather than Tritium, it’s a later version, post ~ 1998.
 
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That is a 41mm watch. Omega’s web site has a page dedicated to that model. Based on the use of Super-Luminova rather than Tritium, it’s a later version, post ~ 1998.
Thank you. How can one tell it’s not Tritium, and Super Luminova? Appreciate the comments
 
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It is a 41mm model

The card says 2004, that sounds about right, maybe it was made a year or two before.

The Lume is obviously SL which tallies with the year, When you see a few you will know they look different. The tritium ones go beige on thel lume plus. They changed over lume type in late 1997.
Edited:
 
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It is a 41mm model

The card says 2004, that sounds about right, maybe it was made a year or two before.

The Lume is obviously SL which tallies with the year, When you see a few you will know they look different. The tritium ones go beige on thel lume plus. They changed over lume type in late 1997.
Thank you, thanks all for confirming