Halios Seaforth IVvsSquale 1521

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Measurements

Catalog photos are all shot at the same flattering size. These aren't: every case below shares one millimeter scale.

Halios Seaforth IV at true scale

Seaforth IV

Squale 1521 at true scale

1521

Diameter

40mm

42mm

Lug-to-Lug

46.5mm

n/a

Thickness

12.4mm

lowest

12.5mm

Water Resistance

200m

500m

highest

Power Reserve

n/a

38h

MSRP

$765

lowest

$1,265

Movement

Sellita SW200-1

Sellita SW200-1

Case

5 specs
Diameter
40mm
42mm
Thickness
12.4mm
12.5mm
Lug-to-Lug
46.5mm
n/a
Material
Titanium
Steel
Water Resistance
200m
500m

Crystal & Dial

2 specs
Crystal
Sapphire (double-domed)
Sapphire
Dial Color
Blue
n/a

Movement

1 specs
Power Reserve
0h
38h

Pricing

1 specs
MSRP
$765
$1,265
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Reviews

Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.

Halios Seaforth IV

Owners widely praise the Halios Seaforth IV's wearability on smaller wrists, citing its manageable 40mm case and 47mm lug-to-lug distance. Admiration is frequently directed towards the sunburst blue dial and the well-executed lume on the sapphire bezel. Some owners find the steel bracelet bland on stainless steel variants, and a few express a desire for white dials or larger case sizes. One owner notes the sapphire bezel is flat and taller than preferred. On balance, owners rate the Halios Seaforth IV highly for its accessible size and quality finishing at its price point.

From video reviewers

The sunburst blue dial is a standout feature. Limited water resistance is a shared concern.

Squale 1521

Owners widely praise the Squale 1521 for its classic look and robust build, with specific mentions of its wearable 12.5mm thickness and refined case finishing. The 42mm case is noted by some to wear smaller, closer to 40mm, due to short lugs, feeling solid without being too large. However, opinions on the bracelet vary, with some finding it too flashy or stiff, and one owner reported moisture ingress after a shower due to a loose case back. The crown can be difficult to operate due to deep integration, and the 38-hour power reserve is considered old-school but reliable. Overall, owners rate the Squale 1521 highly for its classic design and wearability, despite some reservations about the bracelet and crown.