Side by side

Echo/Neutra 1956 ChronovsSinn 903 St II

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

903 St II
Sinn903 St II
MSRP $3,942
What people say

Owners + reviewers, side by side

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

Echo/Neutra 1956 Chrono

Owners widely praise the Echo/Neutra 1956 Chrono for its gorgeous looks and clean design, with one owner calling it a top 5 watch in their collection. The 40mm size and included straps are noted as comfortable and wearable. Some owners find the watch difficult to read in dull lighting. One owner of a 1956 GMT reported a non-screwing crown, and another owner of a 1956 GMT noted a misaligned bezel. Overall, owners rate the Echo/Neutra 1956 Chrono highly for its aesthetic appeal and wearability.

Sinn 903 St II

The Sinn 903 St II is widely praised for its robust build quality, over-engineered feel, and strong value proposition, featuring 200 meters of water resistance and a La Joux-Perret L110 column-wheel chronograph movement. Owners appreciate the hybrid ceramic lume and the practical functionality of the slide rule operated by the bezel. However, reviewers note that the busy slide-rule dial can make time-reading challenging, with some finding the chronograph hand's placement over the "12" numeral less refined. On balance, owners and reviewers rate the Sinn 903 St II highly for its exceptional build quality and value, particularly its robust water resistance and functional slide rule at its price point.

At a glance

19 of 29 specs differ
Diameter
1956 Chrono40mm
903 St II41mm
Power Reserve
1956 Chrono48h
903 St II60h
Water Resistance
1956 Chrono100m
903 St II200m
MSRP
1956 Chrono$2,060
903 St II$3,942

Full specifications

Case

9 specs
Category
Chronograph
Tool
Diameter
40mm
41mm
Thickness
14.1mm
14.5mm
Lug-to-Lug
46mm
Lug Width
0mm
22mm
Material
316L Stainless Steel
Stainless Steel
Finish
Brushed + Polished
polished / satinized
Water Resistance
100m
200m
Caseback
Solid screw-down

Crystal & Dial

4 specs
Crystal Shape
Ultra-domed
Dial Color
White
Black
Indices
Lume
Superluminova Old Radium
None

Movement

5 specs
Caliber
Sellita SW510M BH b elaboré
LJP L110
Type
Manual
Automatic
Power Reserve
48h
60h
Jewels
23
26
Complications
GMT, Chronograph, Moonphase, Date
Date, Chronograph

Pricing

1 specs
MSRP
$2,060
$3,942
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