I have the watch you're showing, SBGA285 it has a matte greyish black dial, 39mm case (37mm if you only measure chapter ring and 31.5mm dial face). To me it is a gada watch and very goos alternative to explorer 1 39~40 mm.
Ive gotten one with ss bracelet few years back, I just love how it looks, never gotten bored. I tried on a few other Omegas like moonwatch, speed reduced, racing ... but the Dynamic was the one I choseor perhaps it chose me :)
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