Side by side

Sinn 140 St SvsBoldr Expedition II

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 140 St S

The Sinn 140 St S is praised for its functional tool watch design and space-flight heritage, incorporating a central chronograph minute hand and Ar-Dehumidifying Technology. Owners note the Tegimented hardened case and bracelet offer durability, with one reporting excellent condition despite minor marks. The 44mm size is considered wearable, though the SZ01 movement, based on the ETA 7750, has a rotor wobble that may not appeal to all. Overall, owners and reviewers value the Sinn 140 St S for its robust build and historical connection.

Boldr Expedition II

Owners widely praise the Boldr Expedition II for its tool watch utility, legible dials, and bead-blasted finish, with many finding its 41mm size ideal for daily wear and comfortable on various wrists. Reviewers and owners alike highlight its excellent value, well-executed details, and the functional design of its knurled crown. Some owners note the dial color can appear creamier than expected online, and one reviewer found the stock rubber strap to be a minor criticism. The Sellita SW200 movement and domed sapphire crystal are also noted as positive features. On balance, owners and reviewers rate the Boldr Expedition II highly for its functional field watch design and excellent value.

From video reviewers

The Boldr Expedition II's solid construction and reliability are notable strengths. A weakness is the potential for dim lume brightness, as the entire dial is fully covered in lume but the reviewer's assessment implies it might be inadequate.

At a glance

18 of 29 specs differ
Diameter
140 St S44mm
Expedition II41mm
Power Reserve
140 St S48h
Expedition II38h
Water Resistance
140 St S100m
Expedition II200m
MSRP
140 St S$4,957
Expedition II$699

Full specifications

Case

7 specs
Diameter
44mm
41mm
Thickness
15mm
14mm
Lug-to-Lug
48mm
Lug Width
22mm
20mm
Finish
black
Water Resistance
100m
200m
Caseback

Crystal & Dial

5 specs
Crystal Shape
AR Coating
Underside
Yes
Dial Color
Black
I Eiger
Indices
Lume
Luminescent
Super-LumiNova

Movement

5 specs
Caliber
SINN Movement SZ01
Sellita SW200-1
Beat Rate
28,800 vph
0 vph
Power Reserve
48h
38h
Jewels
28
0
Complications
Date, Chronograph, Pilot's Bezel
None

Pricing

1 specs
MSRP
$4,957
$699
Keep exploring

More watches worth a look

Matched to the watches above on size, movement, style and price — microbrands first. Open any one to dig in.

Follow this matchup

Get a note when Sinn 140 St S vs Boldr Expedition II gets more votes, a community discussion, or a price drop. No account needed.

Adjacent matchups

People also compared

Comparisons nearby in the catalog — alternatives to the watches above paired against the matchup.