Side by side

Sinn 903 St IIvsMaen Skymaster 38 MKIII

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
Skymaster 38 MKIII
MaenSkymaster 38 MKIII
MSRP $1,679
What people say

Owners + reviewers, side by side

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

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.

Maen Skymaster 38 MKIII

The Maen Skymaster 38 MKIII is praised for its refined case, impressive fit and finish, and compact 38mm size, which offers a premium feel with a sharp, legible dial and well-executed applied markers. Reviewers note the sweet winding action and the vintage-inspired brown sunburst dial with dauphine hands and lollipop register pointers. The watch is powered by a manual-wind Sellita SW510Mb movement with a 63-hour power reserve. Accuracy figures vary, with one reviewer reporting +7 seconds per day and another stating a tolerance of +/-15 seconds per day. On balance, owners and reviewers appreciate the Maen Skymaster 38 MKIII for its refined vintage-inspired design and compact dimensions at its price point.

From video reviewers

The 38mm case size is a key strength for the Maen Skymaster 38 MKIII. Reviewers noted the excellent quality-price ratio for a Swiss-made chronograph.

At a glance

19 of 29 specs differ
Diameter
903 St II41mm
Skymaster 38 MKIII38mm
Power Reserve
903 St II60h
Skymaster 38 MKIII
Water Resistance
903 St II200m
Skymaster 38 MKIII100m
MSRP
903 St II$3,942
Skymaster 38 MKIII$1,679

Full specifications

Case

8 specs
Category
Tool
Chronograph
Diameter
41mm
38mm
Thickness
14.5mm
13.4mm
Lug Width
22mm
Material
Stainless Steel
316L Stainless Steel
Finish
polished / satinized
Water Resistance
200m
100m
Caseback

Crystal & Dial

5 specs
Crystal
Sapphire
Domed Sapphire
Crystal Shape
AR Coating
Underside
Dial Color
Black
M6.1.1
Indices

Movement

5 specs
Caliber
LJP L110
Sellita SW510mb
Beat Rate
28,800 vph
0 vph
Power Reserve
60h
0h
Jewels
26
0
Complications
Date, Chronograph
None

Pricing

1 specs
MSRP
$3,942
$1,679
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