All Seiko lines › Prospex › Land
“Tortoise”
Seiko Prospex Land, 42.4 mm (4R35)
Collector nickname. Where the name comes from
8 versions of this watch are on Seiko's own sites right now, across 20 regions. Last checked Nov 13, 2026.
Estimated US price: About $525 to $900 from Seiko's US list price and its list prices in other countries, converted.
Retailers ask: $880 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
- 4R35
- Case diameter
- 42.4 mm
- Thickness
- 11.7 mm
- Lug to lug
- 45.2 mm
- Variants listed now
- 8
- Regions
- 20
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 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | SRPG13 Also coded SRPG13K1 | Not published | Polyester 87 g | Stainless steel | Regular | 16 regions | 550 EUR Portugal · Nov 13, 2026 about $600 in US dollars | Not seen in stock 1 seller checked | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Where Seiko lists it (19 sites) and its list prices
Buying 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.
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
 | SRPG18 Also coded SRPG18K1 | Not published | Cow leather 85 g | Stainless steel | Regular | 5 regions | 550 USD USA · Nov 13, 2026 | 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. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
 | SRPG15 Also coded SRPG15K1 | Not published | Polyester 87 g | Stainless steel | Regular | 3 regions Australia, Hungary, USA | 525 USD USA · Nov 13, 2026 | Not seen in stock 1 seller checked | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Where Seiko lists it (3 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.
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
 | SRPH15 Also coded SRPH15K1 | Not published | Not stated Clasp: Three-fold clasp with push button release 150 g | Stainless steel | Regular | 3 regions Australia, Indonesia, USA | 550 USD USA · Nov 13, 2026 | Not seen in stock 1 seller checked | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Where Seiko lists it (3 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.
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
 | SRPH17 Also coded SRPH17K1 | Not published | Not stated Clasp: Three-fold clasp with push button release 150 g | Stainless steel | Regular | 3 regions Australia, Indonesia, USA | 550 USD USA · Nov 13, 2026 | Not seen in stock 1 seller checked | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Where Seiko lists it (3 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.
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
 | SRPH99 Also coded SRPH99K1 | Not published | Polyester 87 g | Stainless steel (hard coating) | LimitáltThe Black Series Limited Edition | 3 regions Australia, Hungary, USA | 575 USD USA · Nov 13, 2026 | Not seen in stock 1 seller checked | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Where Seiko lists it (3 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.
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
 | SRPG17 Also coded SRPG17K1 | Not published | Cow leather 85 g | Stainless steel | Regular | 2 regions Australia, USA | 525 USD USA · Nov 13, 2026 | 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. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| SRPK77K1 | Not published | Nemesacél óraszíj Seiko's regional wording | Nemesacél óratok Seiko's regional wording | Limitált | 2 regions Hungary, Ireland | 795 EUR Ireland · Nov 13, 2026 about $900 in US dollars | From 795.00 EUR Seiko Boutique Ireland · 1 seller checked | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Where Seiko lists it (2 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.
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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 | SRPK77K1 | 795.00 EUR about $880 | 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 | Automatic with manual winding | Seiko product page |
|---|---|---|
| Functions | Stop second hand function Date display | Seiko product page |
| Power reserve / battery | Approx. 41 hours | Seiko product page |
| Water resistance | 20 bar | Seiko product page |
| Crystal | Sapphire crystal | Seiko product page |
| Lug width | 20 mm | Seiko product page |
| Seiko case codes | 4R35-04Y0, 4R35-05H0 | Seiko catalog data |
Why these share a page
Every version here is published by Seiko with calibre 4R35 and either the same Seiko case code or the same case size. 15 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.
| “Tortoise” | Collector nickname. Source names SRPG13K1, SRPG15K1, SRPG17K1, SRPG18K1. “The reason for calling these references SRPG13K1, SRPG15K1, SRPG17K1 and SRPG18K1 the “Seiko Tortoise” is simple: they share their case design with many other “Turtle” diving watches of the brand.” | Monochrome Watches read 2026-11-12 |
|---|
Holden's Watch Desk is an independent catalog. It is not affiliated with, sponsored by or endorsed by Seiko. Seiko and its model names are trademarks of their owners, and the product photos are Seiko's, shown from Seiko's own sites to identify each watch. To report a mistake or ask for something to be removed, email holden@holdenswatchdesk.com.