Side by side

Spinnaker Spence 300vsSinn U1 S L

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

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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.

Spinnaker Spence 300

The Spinnaker Spence 300 is widely praised for its slim 10.9mm case and 40mm diameter, offering a comfortable and uncommon thin diver design at its price point. Reviewers and owners highlight its value, especially below $350, and its blend of retro design with modern specifications, including a 300m depth rating and a fully indexed bezel. Some owners, however, find the dial printing and bracelet finishing to be less refined, with one noting the bracelet's male end links as a drawback. The consensus is that the Spinnaker Spence 300 is highly regarded for its exceptional value and wearable dimensions, making it a strong contender for an everyday sports watch.

From video reviewers

The watch's thin 10.9mm profile for a 300m diver is a key strength. No shared weakness was identified.

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
Spence 30040mm
U1 S L44mm
Power Reserve
Spence 300
U1 S L38h
Water Resistance
Spence 300300m
U1 S L1,000m
MSRP
Spence 300$650
U1 S L$3,532

Full specifications

Case

8 specs
Diameter
40mm
44mm
Thickness
11.5mm
14.7mm
Lug-to-Lug
48mm
Lug Width
20mm
22mm
Material
316L Stainless Steel
Stainless Steel
Finish
black
Water Resistance
300m
1000m
Caseback

Crystal & Dial

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

Movement

4 specs
Caliber
Seiko NH35
Sellita SW200-1
Beat Rate
0 vph
28,800 vph
Power Reserve
0h
38h
Jewels
0
26

Pricing

1 specs
MSRP
$650
$3,532
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