All Seiko lines › Prospex › Sea
“Baby Tuna”
Seiko Prospex Sea diver's, 46.7 mm, 12.6 mm thick (V157)
Collector nickname. Where the name comes from
6 versions of this watch are on Seiko's own sites right now, across 9 regions. Last checked Nov 13, 2026.
Estimated US price: About $445 to $485, converted from Seiko's list prices in EUR, GBP, HKD and more.
Retailers ask: $530 across 1 listing at 1 seller, checked Nov 13, 2026. See the sellers
Photos are Seiko's own, shown from Seiko's sites. Click a photo to jump to that version.
- Calibre
- V157
- Case diameter
- 46.7 mm
- Thickness
- 12.6 mm
- Lug to lug
- 45.8 mm
- Variants listed now
- 6
- Regions
- 9
Listed means the watch was on an official Seiko regional site or store at the last check. It does not mean it is in stock, and it does not tell us whether Seiko is still making it.
Versions listed now
Same case and movement in every row. What changes is the colour, the strap or bracelet, the finish and where Seiko sells it. Seiko's spec sheets don't state dial colour, so a colour appears only where Seiko's US store tags one.
| Photo | Reference | Colour | Strap / bracelet | Case | Edition | Listed in | Seiko list price | Buy | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | SNE537 Also coded SNE537P1 | Not published | Silicone | Stainless steel(hard coating) and plastic | Regular | 6 regions | 479 EUR Ireland · Nov 13, 2026 about $485 in US dollars | From 479.00 EUR Seiko Boutique Ireland · 1 seller checked | ||||||||||
Where Seiko lists it (6 sites) and its list pricesBuying options (1)Offers seen available at the last check come first, then by item price. Shipping, taxes and import charges are not included. Commission never affects the order.
| ||||||||||||||||||
 | SNE533 Also coded SNE533P1 | Not published | Silicone | Stainless steel(hard coating) and plastic | Regular | 5 regions | 420 EUR Portugal · Nov 13, 2026 about $465 in US dollars | No seller matched yet | ||||||||||
Where Seiko lists it (5 sites) and its list pricesBuying options (0)No seller offer has been matched to this exact variant yet. | ||||||||||||||||||
 | SNE535 Also coded SNE535P1 | Not published | Silicone | Stainless steel(hard coating) and plastic | Regular | 4 regions India, Indonesia, Portugal, UK | 420 EUR Portugal · Nov 13, 2026 about $465 in US dollars | No seller matched yet | ||||||||||
Where Seiko lists it (4 sites) and its list pricesBuying options (0)No seller offer has been matched to this exact variant yet. | ||||||||||||||||||
 | SNE561 Also coded SNE561P1 | Not published | Not stated 96 g | 不鏽鋼及塑膠(硬质涂层处理) Seiko's regional wording | Regular | 2 regions Hong Kong, Indonesia | 3,480 HKD Hong Kong · Nov 13, 2026 about $445 in US dollars | No seller matched yet | ||||||||||
Where Seiko lists it (2 sites) and its list pricesBuying options (0)No seller offer has been matched to this exact variant yet. | ||||||||||||||||||
 | SNE559 Also coded SNE559P1 | Not published | Silicone 96 g | Stainless steel(hard coating) and plastic | Regular | 1 region Singapore | 588.50 SGD Singapore · Nov 13, 2026 about $460 in US dollars | No seller matched yet | ||||||||||
Where Seiko lists it (1 site) and its list prices
Buying options (0)No seller offer has been matched to this exact variant yet. | ||||||||||||||||||
 | SNE563 Also coded SNE563P1 | Not published | Not stated 96 g | 不鏽鋼及塑膠(硬质涂层处理) Seiko's regional wording | Regular | 1 region Hong Kong | 3,480 HKD Hong Kong · Nov 13, 2026 about $445 in US dollars | No seller matched yet | ||||||||||
Where Seiko lists it (1 site) and its list prices
Buying options (0)No seller offer has been matched to this exact variant yet. | ||||||||||||||||||
Where to buy
Asking prices for new watches at the last check. Each was in stock at that check, but stock moves, and shipping, tax and import charges are not included. Each reference links to the seller's page.
| Seller | Version | Asking price | Checked |
|---|---|---|---|
| Seiko Boutique Ireland | SNE537 | 479.00 EUR about $530 | Nov 13, 2026 |
Estimated US prices use Seiko's US list price where there is one. Otherwise they are the middle of Seiko's list prices in other countries, converted at rates dated Nov 12, 2026 from ExchangeRate-API (free open endpoint). Those list prices include each country's sales tax, so a converted figure usually runs higher than a US price would. Retailer prices are asking prices on the date shown, not sold prices, and leave out shipping, tax and import charges.
The build
| Movement | Solar | Seiko product page |
|---|---|---|
| Functions | Overcharge prevention function Quick-start function Date display | Seiko product page |
| Power reserve / battery | Operating for approx. 10 months (when fully charged) | Seiko product page |
| Water resistance | 200m / 660ft diver's | Seiko product page |
| Crystal | Hardlex | Seiko product page |
| Lug width | 22 mm | Seiko product page |
| Seiko case codes | V157-0DC0, V157-0DH0 | Seiko catalog data |
Why these share a page
Every version here is published by Seiko with calibre V157 and either the same Seiko case code or the same case size. 12 reference codes lead to this page.
What people call it
A name is shown only where a source ties it to a reference on this page. Collector nicknames are not Seiko's names unless the row says so.
| “Baby Tuna” | Collector nickname. Source names SNE535, SNE537. “For 2018 Seiko will release this trio of smart-looking “Street Series” models in the Prospex collection that uses the “Baby Tuna” case – as many of us enthusiasts call it.” | aBlogtoWatch read 2026-11-12 |
|---|
Related lines
- “Tuna” · Seiko Prospex Sea, 46.7 mm (V157)
Same calibre and diameter, different published case - “Tuna” · Seiko Prospex Street Series diver's, 46.7 mm, 12 mm thick (V157)
Same calibre and diameter, different published case - “Tuna” · Seiko Prospex Street Series diver's, 46.7 mm, 12.6 mm thick (V157)
Same calibre and diameter, different published case - “Tuna” · Seiko Prospex Sea diver's, 46.7 mm, 11.8 mm thick (V157)
Same calibre and diameter, different published case
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