Side by side

Halios Seaforth IVvsLongines MASTER COLLECTION

The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.

Seaforth IV
HaliosSeaforth IV
MSRP $765
MASTER COLLECTION
LonginesMASTER COLLECTION
MSRP $3,100

At a glance

21 of 29 specs differ
Diameter
Seaforth IV40mm
MASTER COLLECTION42mm
Power Reserve
Seaforth IV40h
MASTER COLLECTION
Water Resistance
Seaforth IV200m
MASTER COLLECTION30m
MSRP
Seaforth IV$765
MASTER COLLECTION$3,100

Full specifications

Case

9 specs
Category
Diver
Diameter
40mm
42mm
Thickness
12.4mm
9.64mm
Lug-to-Lug
46.5mm
49.6mm
Lug Width
20mm
21mm
Material
Titanium
Stainless Steel
Finish
Brushed and polished
Water Resistance
200m
30m
Caseback
Solid

Crystal & Dial

5 specs
Crystal
Sapphire (double-domed)
Sapphire
Crystal Shape
Flat
AR Coating
Inner
Dial Color
Blue
Silver
Indices
Applied

Movement

6 specs
Caliber
Sellita SW200-2
L888.5
Beat Rate
28,800 vph
0 vph
Power Reserve
40h
0h
Jewels
25
0
Hacking
Yes
No
Hand-winding
Yes
No

Pricing

1 specs
MSRP
$765
$3,100

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What people say

Owners + reviewers, side by side

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

Halios Seaforth IV

Owners widely praise the Halios Sunburst Blue for its perfect 40mm size, stunning sunburst dial, and excellent lume, with one owner calling it Halios's best effort and a potential "Omega AT killer." The ETA 2824 movement is noted as running smoothly, and the watch is considered a great value with strong resale. Some owners desire larger sizes or different dial colors, and one reviewer found the Sinn 556i more versatile. The sapphire bezel is described as tall and flat, which is a point of contention for some. Overall, owners rate the Halios Sunburst Blue highly for its design, size, and value.

From video reviewers

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

Longines MASTER COLLECTION

Owners and reviewers widely praise the Longines Master Collection for its excellent fit and finish, heritage-inspired design with features like Breguet numerals and leaf hands, and the value it offers, particularly for complications like chronographs and annual calendars. Specific models are noted for their beautiful dial execution, creamy white barleycorn or blue starburst finishes, and practical complications. Some owners find the Master Collection thin and dressy, appreciating its vintage aesthetic. However, drawbacks mentioned include a subdial potentially obscuring numerals, a bracelet lacking micro-adjustments causing fit issues for some, and a case finishing described as homogenous by one owner. The 30m water resistance on annual calendar models is considered light, and the crown and pushers on the moon phase chronograph are described as uninspiring. One owner reported a broken moon phase setting mechanism.

From video reviewers

The diamond hour markers are a notable strength. The movement accuracy was not discussed.

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