Side by side

Sinn 556 I WTvsNivada Grenchen Antarctic 38mm Automatic

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.

Sinn 556 I WT

The Sinn 556 I WT is seen as a good value, though some owners find its stark black dial and white markers visually flat compared to more textured dials. While its minimalist design, screw-down crown, and water resistance are praised, some find the two-dimensional dial lacks visual substance. Overall, owners rate the Sinn 556 I WT well for its value and solid specifications, despite some finding its austere dial design polarizing.

Nivada Grenchen Antarctic 38mm Automatic

Nivada Grenchen Antarctic 38mm Automatic owners widely praise its excellent quality for the price, with reviewers highlighting its authentic tropical dial recreation and attractive 38mm case proportions. Owners report accuracy ranging from +6 to +9 seconds per day, and one reviewer notes the Soprod P024 movement has a 38-hour power reserve. The included rally strap is considered mismatched by one reviewer, and the beige Super-LumiNova on a 35mm variant was described as too yellow. On balance, owners and reviewers rate the Nivada Grenchen Antarctic 38mm Automatic highly for its authentic design and excellent quality at its $750 price point.

At a glance

16 of 29 specs differ
Diameter
556 I WT38.5mm
Antarctic 38mm Automatic38mm
Power Reserve
556 I WT38h
Antarctic 38mm Automatic36h
Water Resistance
556 I WT200m
Antarctic 38mm Automatic200m
MSRP
556 I WT$2,106
Antarctic 38mm Automatic$945

Full specifications

Case

6 specs
Diameter
38.5mm
38mm
Thickness
11mm
10.1mm
Lug-to-Lug
0mm
Lug Width
20mm
0mm
Finish
satinized
Brushed + Polished + Satin
Caseback
Display

Crystal & Dial

5 specs
Crystal Shape
AR Coating
Underside
Dial Color
Red
Brown
Indices
Applied
Lume
Luminescent
Super-LumiNova

Movement

4 specs
Beat Rate
28,800 vph
0 vph
Power Reserve
38h
36h
Jewels
26
0
Complications
None
GMT

Pricing

1 specs
MSRP
$2,106
$945
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