Side by side

Sinn 240 St GZvsHamilton Khaki Field Auto

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 240 St GZ

The Sinn 240 St GZ is praised for its highly legible, contrasting dial and bead-blasted stainless steel case, which benefits from Sinn's hardening treatment. Owners note the crystal is perfect, and the Tegimented PVD bracelet is in near-new condition. However, reviewers flag the inner rotating bezel as slightly wobbly and rattly, and the Sellita SW220-1 movement is described as coarse with rough winding. On balance, owners and reviewers appreciate the Sinn 240 St GZ for its excellent dial legibility and robust case finishing.

From video reviewers

The unique internal tide bezel is a key functional element for maritime use. Reviewers noted the SW 220-1 movement and 100m water resistance. No shared weaknesses or points of disagreement were identified.

Hamilton Khaki Field Auto

Owners and reviewers widely praise the Hamilton Khaki Field Auto for its classic military design, legibility, and versatile modern-vintage aesthetic that can be dressed up or down. The H-10 movement is frequently highlighted for its reliable accuracy, with figures ranging from less than one second per day to +/- 3 seconds per day, and its advertised 80-hour power reserve. Reviewers note its solid build and 100m water resistance, while owners appreciate its comfortable wearability and practical beauty. Some owners criticize the bracelet's limited micro-adjustments and the lack of anti-reflective coating on the crystal, which can cause glare. One owner considers the watch "just ok" and not worth its current price, citing legibility issues with smaller dial markers and the omission of a screw-down crown. Another reviewer finds the sunburst and concentric graining on newer dials to be too flashy for a traditional field watch.

From video reviewers

The Hamilton Khaki Field Auto's smooth and precise bezel action is a standout feature. The watch's lume brightness is somewhat lacking, which might be a drawback for those who prefer a brighter glow in the dark. Reviewers disagree on the watch's size, with one reviewer finding the 38mm to be a pleasant surprise, while the watch is also available in 42mm.

At a glance

17 of 29 specs differ
Diameter
240 St GZ43mm
Khaki Field Auto38mm
Power Reserve
240 St GZ38h
Khaki Field Auto80h
Water Resistance
240 St GZ100m
Khaki Field Auto100m
MSRP
240 St GZ$2,311
Khaki Field Auto$845

Full specifications

Case

6 specs
Category
Tool
Field
Diameter
43mm
38mm
Lug-to-Lug
47mm
Lug Width
22mm
20mm
Finish
bead-blasted
Caseback

Crystal & Dial

5 specs
Crystal Shape
AR Coating
Underside
Dial Color
Blue
Black
Indices
Lume
Luminescent
None

Movement

5 specs
Caliber
Sellita SW220-1
Hamilton H-10
Beat Rate
28,800 vph
0 vph
Power Reserve
38h
80h
Jewels
26
0
Complications
Date, Day-Date
None

Pricing

1 specs
MSRP
$2,311
$845
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