200M may be minimum, but it's the actual maximum most will ever go. That's 600 feet, and the logistics of taking enough air for decompression stages starts coming into play. To me, it's exactly why 500M is a joke. Very few have done it in real life. That's the disconnect between writing on the dial and the real world - at a certain point, oneupmanship comes into play, mines better than yours, and the ego games start. Look carefully at the dial shapes in the pics here, Seiko is distinctive, but how many are simply Rolex Sub homages? No imagination, follow the herd thinking. I might consider buying a Cobra replicar because it's baseline performance is still in the top 5% of cars on the road - but a Rolex homage? No, it's just looks, and usually run of the mill performance. Even if the Sub isn't labeled to Dive standards, it can do the job. Affordable Dive watches are in abundance, it's really a matter of finding them by specific model. Once one is chosen, then search on forum vendors and the occasional recommendation in a post. I found my SKX for under $130 that way, a one day deal.