On Holden’s list, Thinking About
Seiko Presage Cocktail Time 'Blue Moon'
The Seiko Presage Cocktail Time 'Blue Moon' (SRPB43) is a dress watch from Seiko: a 40.5 mm stainless steel case, 11.8 mm thick and 47.5 mm lug to lug, with an automatic 4R35 movement and 50 m water resistance.
Going by its 47.5 mm lug to lug, it should sit within the flat top of a wrist of about 6.4 inches (16.4 cm) or larger.
Research found it at $450 list in the US (checked August 2026).
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 | SRPB43 |
| Category | Dress |
| Production | Current (introduced 2017) |
| Case and size [1][2][3] | |
| Case diameter | 40.5 mm |
| Lug to lug | 47.5 mm |
| Thickness | 11.8 mm |
| Lug width | 20 mm |
| Case material | Stainless steel |
| Crystal | Box-shaped Hardlex |
| Water resistance | 5 bar / 50 m |
| Weight | 69 g |
| Movement [1][2][3] | |
| Movement | 4R35 (4R35B per 12&60), automatic |
| Power reserve | Approx. 41 hours |
| Accuracy | Official spec not stated in fetched sources; 12&60 review sample measured -0.2 s/day |
| Bracelet [1][2][3] | |
| Bracelet or strap | Black leather strap with blue contrast stitching and deployant clasp |
| Clasp | Deployant clasp; 12&60 found its orientation strange, requiring strap repositioning |
| Price and warranty (US) [1][2] | |
| List price (US) | $450 (Seiko USA page, 2026-08-26; listed sold out with notify option) |
| Street price (US) | Unknown |
| Used price (US) | Unknown |
| Warranty | 3-year warranty cited by 12&60 |
Will it fit?
A watch wears comfortably when its lugs stay on the flat top of the wrist. Here is the 47.5 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
- Standout seven-layer gloss sunray dial regularly called best-in-class for the money
- Slim 11.8-12 mm dress profile and light 69 g weight
- In-house 4R35 with hacking and hand winding; one sample measured -0.2 s/day
- Very low realistic acquisition price
Weaknesses
- Plain polished barrel case does not match the dial's ambition [2]
- Supplied strap widely criticized
- Hardlex, 50 m WR, 41 h reserve
- Oversized crown can bother bony wrists [3]
Research scores, 0 to 10
| Execution and feel in the hand | 6.8 |
|---|---|
| Design identity | 7.5 |
| Value at a realistic price | 7.8 |
| Long-term ownership | 6.8 |
| Movement and engineering | 5.0 |
| Wearability and proportions | 7.0 |
| Versatility and durability | 6.3 |
| Fit with Holden's collection | 6.5 |
Also on Holden’s list
Other dress watches on his list.
Sources
- Seiko Presage Cocktail Time SRPB43 — official Seiko USA product page seikousa.com · read August 26, 2026
- Seiko Presage Cocktail Time SRPB43 Watch Review 12and60.com · read August 26, 2026
- Seiko Presage Automatic SRPB43 Watch Review ablogtowatch.com · read August 26, 2026
Personal research, not a source of truth. Spotted an error? Email a correction.