Side by side

Tudor Black Bay BronzevsZelos Spearfish GMT

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

Black Bay Bronze
TudorBlack Bay Bronze
MSRP $5,425
Spearfish GMT
ZelosSpearfish GMT
MSRP $999

At a glance

19 of 29 specs differ
Diameter
Black Bay Bronze43mm
Spearfish GMT40mm
Power Reserve
Black Bay Bronze70h
Spearfish GMT40h
Water Resistance
Black Bay Bronze200m
Spearfish GMT200m
MSRP
Black Bay Bronze$5,425
Spearfish GMT$999

Full specifications

Case

8 specs
Category
Diver
GMT
Diameter
43mm
40mm
Thickness
14.6mm
13mm
Lug-to-Lug
46mm
40mm
Lug Width
23mm
20mm
Material
Bronze
316L Stainless Steel
Finish
Satin
Brushed and polished
Caseback
Engraved
Solid

Crystal & Dial

4 specs
Crystal Shape
Flat
AR Coating
Inner
Dial Color
Grey
Frost
Indices
Applied

Movement

6 specs
Caliber
MT5601
Sellita SW330-2
Beat Rate
0 vph
28,800 vph
Power Reserve
70h
40h
Jewels
0
25
Hacking
No
Yes
Hand-winding
No
Yes

Pricing

1 specs
MSRP
$5,425
$999

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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.

Tudor Black Bay Bronze

The Tudor Black Bay Bronze is widely praised for its unique, evolving aesthetic due to its bronze case that develops a pleasing patina over time, with owners finding this gradual aging process incrementally pleasurable and ideal for summer wear. Reviewers highlight its robust construction, in-house MT5601 movement with a 70-hour power reserve and excellent accuracy, with one source reporting it losing about one second every three days. The 43mm case size is noted as being larger than other Black Bay models, and while some find it surprisingly comfortable and well-proportioned with its Arabic numerals, others consider it too large and bold for daily wear under a suit cuff, with the bronze case deemed less smart than steel. The matte brown dial with an explorer-style layout and gilt snowflake hands are also frequently mentioned features. One owner specifically praised the bezel's feel as the best on the market, though another reviewer found the dial numerals and lume weak.

Zelos Spearfish GMT

The Zelos Spearfish GMT is widely praised for its exceptional value, with reviewers highlighting its superb finishing, flawless machining, and a tool-less micro-adjustment clasp that exceeds its price point. It features a La Joux-Perret G100 movement with a 68-hour power reserve, achieving an average accuracy of +2.6 seconds per day, or a Miyota 9075 movement offering flier-style GMT functionality. The 40mm case and bidirectional 48-click ceramic bezel are well-executed, though one reviewer noted a minor compromise in the end link fit. Overall, owners and reviewers rate the Zelos Spearfish GMT highly for its impressive finishing and value proposition.

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