Side by side

Sinn 140 St SvsHamilton Khaki Field Auto Chrono

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.

Hamilton Khaki Field Auto Chrono

The Hamilton Khaki Field Auto Chrono is widely praised for its retro military design, value proposition, and reliable ETA movement. Reviewers highlight its 42mm steel case, 100m water resistance, and the H-21 automatic movement offering a 60-hour power reserve. One editorial review notes the unusual dial layout omits a running seconds indicator for symmetry, featuring day and date windows instead. The case is described as black PVD-treated stainless steel with a brushed finish and polished bezel, complemented by a black-on-black dial with dark grey Super-LumiNova and polished Arabic numerals. Overall, owners and reviewers consider the Hamilton Khaki Field Auto Chrono a well-designed tactical sports watch offering a strong combination of style and value.

From video reviewers

The reliable automatic chronograph movement and rugged, military-inspired aesthetic are cited as strengths. Reviewers did not reach a consensus on any weaknesses.

At a glance

17 of 29 specs differ
Diameter
140 St S44mm
Khaki Field Auto Chrono42mm
Power Reserve
140 St S48h
Khaki Field Auto Chrono60h
Water Resistance
140 St S100m
Khaki Field Auto Chrono100m
MSRP
140 St S$4,957
Khaki Field Auto Chrono$2,175

Full specifications

Case

7 specs
Category
Tool
Chronograph
Diameter
44mm
42mm
Thickness
15mm
14.5mm
Lug-to-Lug
0mm
Lug Width
22mm
20mm
Finish
black
Caseback

Crystal & Dial

4 specs
Crystal Shape
AR Coating
Underside
Indices
Lume
Luminescent
None

Movement

5 specs
Caliber
Sinn SZ01
Hamilton H-21
Beat Rate
28,800 vph
0 vph
Power Reserve
48h
60h
Jewels
28
0
Complications
Date, Chronograph, Pilot's Bezel
None

Pricing

1 specs
MSRP
$4,957
$2,175
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