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 $6,350

At a glance

22 of 29 specs differ
Diameter
Seaforth IV40mm
MASTER COLLECTION25.5mm
Power Reserve
Seaforth IV40h
MASTER COLLECTION45h
Water Resistance
Seaforth IV200m
MASTER COLLECTION30m
MSRP
Seaforth IV$765
MASTER COLLECTION$6,350

Full specifications

Case

9 specs
Category
Diver
Diameter
40mm
25.5mm
Thickness
12.4mm
9mm
Lug-to-Lug
46.5mm
30.6mm
Lug Width
20mm
13mm
Material
Titanium
Gold
Finish
Brushed and polished
Water Resistance
200m
30m
Caseback
Solid
Transparent case back with sapphire crystal

Crystal & Dial

6 specs
Crystal
Sapphire (double-domed)
Sapphire
Crystal Shape
Flat
AR Coating
Inner
Dial Color
Blue
Silver
Indices
Applied
Painted Arabic numerals
Lume
None
Super-LumiNova

Movement

6 specs
Caliber
Sellita SW200-2
L592.5
Power Reserve
40h
45h
Jewels
25
0
Hacking
Yes
No
Hand-winding
Yes
No
Complications
None
Hours, minutes, seconds and date

Pricing

1 specs
MSRP
$765
$6,350

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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

The Longines Master Collection is widely praised for its excellent value, with reviewers and owners citing its dressy aesthetic, good fit and finish, and attractive complications like annual calendars and chronographs for under $3,000. Owners highlight the beautiful dials, engraved numerals, and the L893 caliber's 72-hour power reserve. Some find the standard Master Collection thin and well-finished, while others note a slightly thicker case on certain models. A few owners express reservations about the bracelet's adjustment options and the homogeneity of the case finishing. One reviewer points out that the subdial can obscure the '7' numeral on the Small Seconds model, and another notes that pushers can feel cheap and the chrono hour counter may not reset perfectly. Water resistance is noted as 30m on some models.

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