Side by side

Hamilton Khaki Aviation Converter AutovsSeestern S446 GMT

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

Khaki Aviation Converter Auto
HamiltonKhaki Aviation Converter Auto
MSRP $1,345
S446 GMT
SeesternS446 GMT
MSRP $299

At a glance

13 of 29 specs differ
Diameter
Khaki Aviation Converter Auto42mm
S446 GMT39.5mm
Power Reserve
Khaki Aviation Converter Auto80h
S446 GMT41hh
Water Resistance
Khaki Aviation Converter Auto100m
S446 GMT100m
MSRP
Khaki Aviation Converter Auto$1,345
S446 GMT$299

Full specifications

Case

5 specs
Category
Pilot
GMT
Diameter
42mm
39.5mm
Thickness
10.87mm
13mm
Lug-to-Lug
46mm
47mm
Material
Stainless Steel
316L Stainless Steel

Crystal & Dial

2 specs
Crystal Shape
Flat
Domed
Dial Color
Black
Cream

Movement

5 specs
Caliber
H-10
Seiko NH34A GMT
Beat Rate
28,800 vph
3 vph
Power Reserve
80h
41hh
Jewels
25
24
Complications
None
GMT, Date

Pricing

1 specs
MSRP
$1,345
$299

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What people say

Owners + reviewers, side by side

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

Hamilton Khaki Aviation Converter Auto

The Hamilton Khaki Aviation Converter Auto is recognized for its classic pilot's watch aesthetic, featuring a functional bi-directional slide rule bezel with a mineral glass insert for scratch protection. Reviewers highlight its instrument-heavy design, well-balanced dial, and robust 42mm or 44mm case with a satin-brushed finish and polished accents. The watch is equipped with applied indexes and hands filled with Super-LumiNova for legibility, and a flat sapphire crystal with double anti-reflective coating. The automatic models utilize the H-10 movement, offering a 60-hour power reserve, while the chronograph version uses the H-21-Si movement. Overall, reviewers praise the Hamilton Khaki Aviation Converter Auto for its attractive, functional pilot's watch design and robust build at its price point.

Seestern S446 GMT

Owners widely praise the Seestern S446 GMT for its stunning finishing and extreme value, with a sapphire crystal and adjustable clasp. The winding action is noted as buttery smooth, and the 39.5mm case size is considered very wearable. Some owners, however, flag the lume as a weak point and one owner found the bracelet clasp lacked sufficient micro-adjustment. The Seestern S446 GMT is considered an extreme value for the dollar. Overall, owners rate the Seestern S446 GMT highly for its exceptional finishing and value proposition at its price point.

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