Before joining the forum I had started studying vintage Omega and I came here thinking I wanted three things: sub seconds, a 30mm caliber, and a broad arrow hand. Then I learned I could have all three in one single watch. I’m stoked.
Actually yours was a major driver to me looking specifically for the white one I had saved that first picture from a previous thread.
Here's why the vintage omega universe is really big - here's a completely different model that fulfills your conditions (same size but different case).