Side by side

Spinnaker Cahill AutomaticvsSinn U1 S L

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

What people say

Owners + reviewers, side by side

Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.

Spinnaker Cahill Automatic

Owners widely praise the Spinnaker Cahill Automatic for its attractive vintage-inspired design, comfortable wearability on smaller wrists, and good timekeeping, with one owner specifically noting the large "maxi" indices and NATO strap as highlights. However, some find the lume application uneven and note the use of a mineral crystal. A significant concern raised by one owner is a report of internal component failures and a perceived lack of quality control within the brand. On balance, the Spinnaker Cahill Automatic is well-regarded by owners for its style and value, particularly at specific price points, despite some noted manufacturing inconsistencies.

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

17 of 29 specs differ
Diameter
Cahill Automatic42mm
U1 S L44mm
Power Reserve
Cahill Automatic
U1 S L38h
Water Resistance
Cahill Automatic200m
U1 S L1,000m
MSRP
Cahill Automatic$350
U1 S L$3,532

Full specifications

Case

7 specs
Diameter
42mm
44mm
Thickness
13.7mm
14.7mm
Lug-to-Lug
51mm
Material
316L Stainless Steel
Stainless Steel
Finish
black
Water Resistance
200m
1000m
Caseback

Crystal & Dial

5 specs
Crystal Shape
AR Coating
Underside
Dial Color
Green
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
$350
$3,532
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