In Holden’s collection
Seiko King Turtle Black Series 'Night Vision' SRPK43
The Seiko King Turtle Black Series 'Night Vision' SRPK43 (SRPK43K1) is a dive watch from Seiko: a 45 mm stainless steel case, 13.2 mm thick and 47.7 mm lug to lug, with an automatic 4R36 movement and 200 m water resistance.
Going by its 47.7 mm lug to lug, it should sit within the flat top of a wrist of about 6.5 inches (16.4 cm) or larger.
Research found it at $765 list in the US (checked August 2026).
I really love this one. It's 45 mm and it still fits my wrist really well, and the all-black look is sharp. I just hope the black coating holds up for the long haul, and the bracelet isn't good.
Specifications
From the research, with the sources for each group of facts. Unknown means no source confirmed it.
| The watch [1][2][3] | |
|---|---|
| Brand | Seiko |
| Reference | SRPK43K1 |
| Category | Diver |
| Production | Current (introduced 2024) |
| Case and size [1][2] | |
| Case diameter | 45 mm |
| Lug to lug | 47.7 mm |
| Thickness | 13.2 mm |
| Lug width | 22 mm |
| Case material | Stainless steel |
| Crystal | Sapphire, anti-reflective inner coating, magnifier over date |
| Water resistance | 200 m / 660 ft diver's specification |
| Weight | 198 g |
| Movement [1][2] | |
| Movement | 4R36, automatic |
| Power reserve | Approx. 41 hours |
| Accuracy | Unknown |
| Bracelet [1][2] | |
| Bracelet or strap | Three-link stainless steel bracelet with matching black hard coating |
| Clasp | Three-fold clasp with secure lock, push-button release and diving extension |
| Price and warranty (US) [1][2][4][5] | |
| List price (US) | $765 (official US page, 2026-08) |
| Street price (US) | Unknown |
| Used price (US) | Unknown |
| Warranty | Unknown |
Will it fit?
A watch wears comfortably when its lugs stay on the flat top of the wrist. Here is the 47.7 mm lug to lug against the flat top estimated for common wrist sizes.
| Wrist | Flat top | Fit |
|---|---|---|
| 6 in 15.2 cm | 47 mm | Likely overhangs |
| 6.5 in 16.5 cm | 51 mm | Comfortable |
| 7 in 17.8 cm | 55 mm | Comfortable |
| 7.5 in 19.1 cm | 59 mm | Comfortable |
| 8 in 20.3 cm | 63 mm | Comfortable |
Check it against your own wrist An estimate, not a guarantee; how the method works is on the tool page.
What the research found
These are the research’s judgments, scored against Holden’s priorities, not his own words.
Strengths
- King Turtle hardware: sapphire, ceramic bezel insert, 200 m diver's spec at a modest price
- Coherent 'Night Vision' concept — matte black everything with green Lumibrite Pro
- Cushion case wears much smaller than 45 mm suggests (47.7 mm lug-to-lug)
- Day-date practicality
Weaknesses
- Black hard coating over bright stainless steel — wear-through risk grows over a multi-decade horizon
- 4R36 is the entry calibre in an otherwise upgraded package
- Solid caseback, no display of an undecorated movement is no loss, but spec ceiling is visible
- Trend-driven blacked-out styling narrows versatility and future taste-safety
Research scores, 0 to 10
| Execution and feel in the hand | 6.8 |
|---|---|
| Design identity | 6.5 |
| Value at a realistic price | 5.5 |
| Long-term ownership | 4.5 |
| Movement and engineering | 5.0 |
| Wearability and proportions | 6.8 |
| Versatility and durability | 5.5 |
| Fit with Holden's collection | 3.5 |
Also on Holden’s list
Other diver watches on his list.
- Traser P67 Diver Blue 109375
- Squale 1545 Grey 1545GG.AC
- Glycine Combat Sub 42 GL0533
- Longines HydroConquest (third generation)
- Tudor Pelagos LHD 25610TNL-0001
Sources
- SRPK43 — official product page seikowatches.com · read August 26, 2026
- Introducing: Seiko Prospex King Turtle Black Series SRPK43 monochrome-watches.com · read August 26, 2026
- Seiko King Turtle Black Series SRPK43 | SBDY127 (JDM Edition with Kanji) shoppinginjapan.net · read August 26, 2026
- Seiko Prospex Black Series Night Vision Turtle Diver SRPK43 — WatchCharts model page watchcharts.com · read August 26, 2026
- Seiko Prospex SRPK43 Night Vision Black Series Turtle Limited Edition azfinetime.com · read August 26, 2026
Personal research, not a source of truth. Spotted an error? Email a correction.