Side by side

Seestern S446 GMTvsSpinnaker Cahill Automatic

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

S446 GMT
SeesternS446 GMT
MSRP $299
Cahill Automatic
SpinnakerCahill Automatic
MSRP $350

At a glance

14 of 29 specs differ
Diameter
S446 GMT39.5mm
Cahill Automatic42mm
Power Reserve
S446 GMT41hh
Cahill Automatic40h
Water Resistance
S446 GMT100m
Cahill Automatic200m
MSRP
S446 GMT$299
Cahill Automatic$350

Full specifications

Case

6 specs
Category
GMT
Diver
Diameter
39.5mm
42mm
Thickness
13mm
13.7mm
Lug-to-Lug
47mm
51mm
Lug Width
20mm
22mm
Water Resistance
100m
200m

Crystal & Dial

2 specs
Crystal Shape
Domed
Flat
Dial Color
Cream
Green

Movement

5 specs
Caliber
Seiko NH34A GMT
SII NH35A
Beat Rate
3 vph
28,800 vph
Power Reserve
41hh
40h
Jewels
24
25
Complications
GMT, Date
None

Pricing

1 specs
MSRP
$299
$350

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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.

Seestern S446 GMT

Owners widely praise the Seestern S446 GMT for its stunning finishing and extreme value, with a sapphire crystal and adjustable clasp. The winding action is noted as buttery smooth, and the 39.5mm case size is considered very wearable. Some owners, however, flag the lume as a weak point and one owner found the bracelet clasp lacked sufficient micro-adjustment. The Seestern S446 GMT is considered an extreme value for the dollar. Overall, owners rate the Seestern S446 GMT highly for its exceptional finishing and value proposition at its price point.

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.

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