Vintage Omega Seamaster...

[Defender110]

what does the red button do? my guess would be some sort of HE valve...?

love it or hate it?

[The Technician]

Ploprof. Grail of many diver watch fans. The red button unlocks the bezel.

[longshot]

that's an omega ploprof. one of the coolest and most iconic dive watches ever made. i had one once

the red button is not an he valve. it unlocks the dive bezel so it can be turned. this prevents it from turning unintentionally. the ploprof does not need an he valve. it's that well built. the crystal actually screws into the ss case machined from a sold block of steel

here's a cool review:

http://www.geardiary.com/2007/01/18/the-om...e-watch-review/

[Defender110]

that's an omega ploprof. one of the coolest and most iconic dive watches ever made.

very cool. now i need one.

... i had one once

????!!!! why did you get rid of it?!