Question on Ref 212.30.41.20.01.002 Helium Escape Valve

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Hey guys, I'm new here and I have a question I am trying to answer. Most examples of this reference seem to have a signed HEV. There is one available on EBay that has a HEV labeled simply "He." Is that an OEM configuration or do you think that was an aftermarket replacement? The seller claims it is all original, which gives me pause. It is otherwise in good used condition.

Thanks!

 
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It would be helpful if you included a photo or a full description of the watch. Omega's reference numbers are whack. Almost no one recognizes the model based on the reference number.
 
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It would be helpful if you included a photo or a full description of the watch. Omega's reference numbers are whack. Almost no one recognizes the model based on the reference number.
Thanks! Here's another angle:

 
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I did some checking on that model on Chrono24 and it looks like it should have the Omega logo on the He crown. I owned the 2220.80, which is basically the blue Seamaster to your black and it had the Omega crown. I had it serviced a couple of years ago by Omega and it had the crowns replaced and it still had the Omega logo on it.

It looks like someone has installed a Planet Ocean He crown on the watch. I own the 2201.50 Planet Ocean and that's the He crown it has.
 
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I did some checking on that model on Chrono24 and it looks like it should have the Omega logo on the He crown. I owned the 2220.80, which is basically the blue Seamaster to your black and it had the Omega crown. I had it serviced a couple of years ago by Omega and it had the crowns replaced and it still had the Omega logo on it.

It looks like someone has installed a Planet Ocean He crown on the watch. I own the 2201.50 Planet Ocean and that's the He crown it has.
Thank you soooo much! That's exactly what I was looking for and a good explanation!
 
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HEV still in package...

Which model is that for? I couldn't find any He marked crowns on any Seamaster 300m's made before 2012.