Momentum Sea Quartz 30 Heritage 38 mm — release discovery
Short overview, not a review. Pros and cons restate published facts only. No buying advice. Numbers not shown on a source we opened are omitted or marked unpublished.
Momentum’s Sea Quartz 30 Heritage 38 shrinks the brand’s cushion-style Sea Quartz diver to a 38 mm steel case with black dial, day-date window, rotating dive bezel, and orange minute hand — the same visual language as the larger Sea Quartz 30 line, aimed at smaller wrists per Momentum’s product copy.
On the official product page this steel-bracelet configuration is pre-order only with delivery expected early November (scheduled), per Momentum. Momentum does not print a calendar launch date on that page — only pre-order and fulfilment copy.
US$254.25 sale / US$339.00 regular (Momentum product page, 13 Oct 2026) applies to the steel / black dial / steel bracelet version. Momentum’s homepage shows “From US$221.25” for this model name, and Chronoscout (third-party) last saw US$221.25 on 13 Oct 2026. The prices here are from the steel-bracelet product page.
Verified specs (steel / black dial / steel bracelet)
| Item | Published | Source |
|---|---|---|
| Product name | Sea Quartz 30 Heritage — Black Dial [38mm] | Momentum product page |
| Case diameter | 38 mm | Momentum product page |
| Lug-to-lug | 43 mm | Momentum product page |
| Thickness | 11.7 mm — Momentum lists this as “Case Hight”. | Momentum product page |
| Lug width | 18 mm | Momentum product page |
| Case material | 316L stainless steel; cushion-style case with crown guards (product copy) | Momentum product page |
| Crystal | Sapphire with anti-reflective coating on the inside (Momentum lists “Sapphire (inside AR)”) | Momentum product page |
| Water resistance | 300 m / 990 ft | Momentum product page |
| Movement | Swiss Made quartz, 507 day-date | Momentum product page |
| Crown | Screw-down, locking | Momentum product page |
| Dial / hands | Black dial; day-date; luminous markers; signature orange minute hand; rotating dive bezel (product copy) | Momentum product page |
| Lume (marketing) | C3 Super-LumiNova | Momentum product page |
| Bracelet (this config) | Stainless steel bracelet | Momentum product page |
| US price (this config) | US$254.25 sale / US$339.00 regular (Momentum product page, 13 Oct 2026) | Momentum product page |
| SGD price | Not published | Momentum product page |
| Availability | Pre-order only; limited pieces; delivery expected early November (scheduled), per Momentum | Momentum product page |
| Launch date (official) | Not published as a calendar date — pre-order and early-November delivery copy only | Momentum product page |
Separate bundle product page: steel bracelet + Black OceanFlex + travel case at US$295.50 sale / US$394.00 regular, with the same case size published.
Fit on 6–7 in wrists (6.5 in reference)
Momentum publishes 43 mm lug to lug on a 38 mm case. At 11.7 mm, thickness doesn’t change the score. See the fit checker for how we score watches.
| Wrist (approx.) | Official lug to lug | Thickness | Fit note |
|---|---|---|---|
| 6.0 in (152 mm) | 43 mm | 11.7 mm | Moderate: 43 mm is close to the width of the top of a 6 in wrist. |
| 6.5 in (165 mm) — reference | 43 mm | 11.7 mm | Low: 43 mm is under 90% of the usable wrist span (see our fit checker). |
| 7.0 in (178 mm) | 43 mm | 11.7 mm | Low: 43 mm is under 90% of the usable wrist span (see our fit checker). |
Not published
- Singapore-dollar list price — not on the Momentum product page.
- Official calendar launch date — only pre-order and early-November delivery copy.
- On-wrist photography at 6.5 in — not published by Momentum on the product page.
Short overview
Pros (from published facts)
- Momentum publishes case size: 38 mm diameter, 43 mm lug-to-lug, 11.7 mm thickness, 18 mm lugs.
- 300 m water resistance, sapphire with anti-reflective coating on the inside, screw-down crown, and Swiss Made quartz, 507 day-date on the official spec block.
- About S$326 and S$434 (estimates; ExchangeRate-API open rates, US$1 = S$1.2807, 10 Oct 2026).
- Explicit 38 mm Heritage positioning for smaller wrists in Momentum’s own product copy.
Cons / gaps (from published facts)
- Pre-order with delivery expected early November (scheduled), per Momentum — not a same-day ship on the product page.
- No Singapore-dollar price is on the Momentum product page.
Singapore note
Momentum is brand-direct (no Singapore boutique on the authorised dealers guide). Watches are hand-assembled in Vancouver, Canada, per momentumwatch.com. No Singapore-dollar price is on the product page. About S$326 and S$434 (estimates), converted at US$1 = S$1.2807 (ExchangeRate-API open rates, 10 Oct 2026). The S$326 and S$434 estimates don’t include 9% GST on imports. Watches are not subject to customs duty in the usual consumer path (see Buying in Singapore).
Sources
- Momentum — Sea Quartz 30 Heritage Black Dial [38mm] (primary official specs, USD, pre-order copy)
- Momentum — Sea Quartz 30 Heritage 38 mm bundle (bundle price, same case size)
- Momentum — shop homepage (“From US$221.25” sale, regular US$295, for the product name)
- Exchange rate: ExchangeRate-API open rates, 10 Oct 2026. US$1 = S$1.2807.
- Chronoscout — Momentum Sea Quartz 30 Heritage Black Dial (last saw US$221.25 on 13 Oct 2026; third-party; not official)
- Momentum — Our story (hand assembly in Vancouver, Canada)
- Sea Quartz 30 Heritage 38 mm black dial — Photo: © Momentum. Packshot source: momentumwatch.com/products/sea-quartz-30-heritage-black-dial. Not a try-on.