The Sea-Dweller is rated deeper than the Submariner. After Rolex spun Deepsea into its own collection in 2023, the Sea-Dweller line was left with two references — the steel 126600 and the two-tone 126603 — both water-resistant to 1,220m.

The line has been relatively quiet. Apart from the 2017 update that brought back the single red line and the 2019 debut of the first two-tone version, there has been little product news; the newly independent Deepsea, including the Deepsea Challenge, has taken most of the attention.

Entry prices have nevertheless climbed. The 126600 launched in 2017 at NT$375,000 and now lists at NT$492,000, up about 31.2% in nine years. The 126603 rose from NT$533,000 in 2019 to NT$761,000, up about 42.7%, with adjustments in January and June 2026.

Unlike the hottest sports models, the Sea-Dweller has traded below retail for a long stretch: the 126600 averages around NT$382,000 and the 126603 around NT$504,000. For buyers who want high water resistance without paying a premium, it remains a comparatively rational choice.