Seastar Sundial
$4251,998
40 mm150 m WRSapphire
The Sensei's take
The Spinnaker Seastar Sundial is a bold choice for adventurers seeking a distinctive dive watch. Its striking design and vibrant color palette make it a standout on the wrist, perfect for those who value aesthetics and functionality over sheer specs. At $425, it offers solid value for the unique style and craftsmanship, but I'd recommend it primarily to those who prioritize eye-catching design and are not overly focused on technical features.
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250 Pieces Only Per Variant A fun yet finely engineered timepiece that brings the beloved characters of Bikini Bottom to life. Powered by the Japanese NH70 skeletonized automatic movement, this limited edition features the character-inspired eyes on the bezel and a second hand featuring Bikini Bottom’s most iconic symbol. This watch is as practical as it is collectable.
6.5
SolidSensei Score — Solid
A dependable choice; know the trade-offs going in.
Independent rating. Purchase links may be affiliate.
At a glance
Strengths & trade-offs
Pulled straight from the spec sheet, framed for the buyer. The editorial verdict is the Sensei's take above.
Strengths
- Everyday water resistance (150m)
- Scratch-resistant sapphire crystal
- Versatile 40mm case
- Luminous dial and hands
Trade-offs
- Tall 14mm case
- Priced above what the spec suggests
- Currently sold out
Sensei Says
The specs, in plain English
On the wrist
At 40 mm it lands in the modern sweet spot, a 47 mm lug-to-lug suits most wrists.
The value
Fairly priced for what it is.
On the wrist
How will this watch fit me?
Enter your wrist size once — we'll remember it — and the Sensei estimates the fit from the case measurements.
Wrist circumference
Preferred fit
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Specifications
- Reference
- SP-5152-03
- Released
- 2025
- Production
- Limited edition
- Case diameter
- 40 mm
- Lug-to-lug
- 47 mm
- Thickness
- 14 mm
- Lug width
- 20 mm
- Case shape
- Round
- Case material
- stainless steel
- Water resistance
- 150 m
- Crystal
- Sapphire · anti-reflection
- Bezel
- Fixed
- Caseback
- Exhibition
- Dial colour
- pink
- Indices
- applied
- Lume
- Yes — Swiss Super-LumiNova
- Strap / bracelet
- rubber
- Functions
- Hours, Minutes
- Fit
- Unisex
The maker
Spinnaker Watches
Spinnaker Watches draws inspiration from historical diving aesthetics and the allure of the ocean. They are committed to producing well-crafted, durable timepieces that tell stories of exploration and adventure while promoting conservation through various initiatives.
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