Side by side

Tudor Black Bay BronzevsSinn U1 S L

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

U1 S L
SinnU1 S L
MSRP $3,532

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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.

From video reviewers

The bronze case and its developing patina are highlighted. The woven strap is a positive feature.

Sinn U1 S L

The Sinn U1 S L is widely praised for its intense, full-lume dial, a feature described as new technology that glows brightly, and its unique black and white "arctic tactical" aesthetic. Owners and reviewers consistently highlight the Tegimented German submarine steel case for its exceptional scratch resistance and matte, non-reflective finish, with one owner reporting no scratches on the case after 17 years. The watch is also noted for its legibility and robust build, offering 1000m water resistance. However, some owners find the 44mm size and 14.7mm thickness wear large, and one reviewer noted the 4 o'clock crown positions lacked distinct clicks, leading to difficult date changes. Accuracy figures for the ETA 2824-2 movement vary, with one owner seeing +1/+2 s/day and another about -6 s/day. The Tegimented bracelet is reported to scratch more easily than the case by some, while others found it held up well.

At a glance

18 of 29 specs differ
Diameter
Black Bay Bronze43mm
U1 S L44mm
Power Reserve
Black Bay Bronze70h
U1 S L38h
Water Resistance
Black Bay Bronze200m
U1 S L1,000m
MSRP
Black Bay Bronze$5,425
U1 S L$3,532

Full specifications

Case

8 specs
Diameter
43mm
44mm
Thickness
14.6mm
14.7mm
Lug-to-Lug
0mm
Lug Width
23mm
22mm
Material
Bronze
Stainless Steel
Finish
Satin
black
Water Resistance
200m
1000m
Caseback
Engraved

Crystal & Dial

5 specs
Crystal Shape
AR Coating
Underside
Dial Color
Grey
Black
Indices
Lume
None
Luminescent

Movement

4 specs
Caliber
Tudor MT5601
Sellita SW200-1
Beat Rate
0 vph
28,800 vph
Power Reserve
70h
38h
Jewels
0
26

Pricing

1 specs
MSRP
$5,425
$3,532
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