Side by side

Spinnaker Cahill AutomaticvsSinn U50 SDR with TEGIMENT option

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 U50 SDR with TEGIMENT option

The Sinn U50 SDR with TEGIMENT option is widely praised for its robust submarine steel construction, impressive 50bar water resistance, and excellent anti-reflective coating. Owners and reviewers highlight its toolish, legible dial, satisfyingly tactile bezel, and the outstanding scratch resistance provided by the TEGIMENT hardening. Some owners note the lume is underwhelming, and a few find the clasp aesthetically large and chunky despite its functional diver's extension. Overall, owners and reviewers rate the Sinn U50 SDR with TEGIMENT option highly for its exceptional build quality and scratch resistance at its price point.

At a glance

19 of 29 specs differ
Diameter
Cahill Automatic42mm
U50 SDR with TEGIMENT option41mm
Power Reserve
Cahill Automatic
U50 SDR with TEGIMENT option38h
Water Resistance
Cahill Automatic200m
U50 SDR with TEGIMENT option500m
MSRP
Cahill Automatic$350
U50 SDR with TEGIMENT option$3,326

Full specifications

Case

8 specs
Diameter
42mm
41mm
Thickness
13.7mm
11.2mm
Lug-to-Lug
51mm
Lug Width
22mm
20mm
Material
316L Stainless Steel
Stainless Steel
Finish
bead-blasted
Water Resistance
200m
500m
Caseback

Crystal & Dial

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

Movement

5 specs
Caliber
Seiko NH35
Sellita SW300-1
Beat Rate
0 vph
28,800 vph
Power Reserve
0h
38h
Jewels
0
25
Complications
None
Date

Pricing

1 specs
MSRP
$350
$3,326
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