Side by side

Halios Seaforth IVvsTudor Black Bay 58 Bronze

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

Seaforth IV
HaliosSeaforth IV
MSRP $765
Black Bay 58 Bronze
TudorBlack Bay 58 Bronze
MSRP $5,850

At a glance

17 of 29 specs differ
Diameter
Seaforth IV40mm
Black Bay 58 Bronze39mm
Power Reserve
Seaforth IV40h
Black Bay 58 Bronze70h
Water Resistance
Seaforth IV200m
Black Bay 58 Bronze200m
MSRP
Seaforth IV$765
Black Bay 58 Bronze$5,850

Full specifications

Case

6 specs
Diameter
40mm
39mm
Thickness
12.4mm
11.9mm
Lug-to-Lug
46.5mm
46mm
Material
Titanium
Bronze
Finish
Brushed and polished
Brushed + Satin
Caseback
Solid
Engraved

Crystal & Dial

4 specs
Crystal
Sapphire (double-domed)
Sapphire
Crystal Shape
Flat
AR Coating
Inner
Dial Color
Blue
Black

Movement

6 specs
Caliber
Sellita SW200-2
MT5400
Beat Rate
28,800 vph
0 vph
Power Reserve
40h
70h
Jewels
25
0
Hacking
Yes
No
Hand-winding
Yes
No

Pricing

1 specs
MSRP
$765
$5,850

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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.

Tudor Black Bay 58 Bronze

The Tudor Black Bay 58 Bronze is widely praised for its unique, evolving aesthetic driven by its developing bronze patina, which owners describe as an incremental pleasure and a conversation starter. Reviewers highlight its warm, vintage feel, achieved through the aging bronze case, root-beer brown bezel, and rose gold-toned dive scale, complemented by applied Arabic numerals on a 39mm case. The MT5400 movement is noted for its 70-hour power reserve and COSC-certified accuracy, with one owner reporting a net loss of about one second every three days. The bezel action is described as firm and reassuring, tighter than steel Black Bay models. Owners report the watch wears well dressed up or down, and its finishing is favorably compared to higher-end brands. However, some owners note the soft bronze case scratches easily and can cause blueing on the wrist in hot weather.

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