Side by side

Hamilton American Classic Day Date AutovsGrand Seiko SBGR321

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

American Classic Day Date Auto
HamiltonAmerican Classic Day Date Auto
MSRP $1,245
SBGR321
Grand SeikoSBGR321
MSRP $5,200

At a glance

10 of 29 specs differ
Diameter
American Classic Day Date Auto42mm
SBGR32140mm
Power Reserve
American Classic Day Date Auto80h
SBGR32172h
Water Resistance
American Classic Day Date Auto50m
SBGR321100m
MSRP
American Classic Day Date Auto$1,245
SBGR321$5,200

Full specifications

Case

5 specs
Diameter
42mm
40mm
Thickness
11.55mm
13mm
Lug-to-Lug
46mm
46.6mm
Lug Width
22mm
20mm
Water Resistance
50m
100m

Crystal & Dial

2 specs
AR Coating
Inner
Yes
Dial Color
Grey
Black

Movement

2 specs
Caliber
H-30
9S65
Power Reserve
80h
72h

Pricing

1 specs
MSRP
$1,245
$5,200

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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 American Classic Day Date Auto

Owners widely praise the Hamilton American Classic Day Date Auto for its legible dial, well-integrated day-date complication, and vintage military aesthetic. The 40mm to 42mm case is noted to wear smaller than its dimensions suggest, and the complication is considered well-executed for its price point. However, the lume is criticized for poor intensity and longevity, and the mirror-polished bezel is flagged as a scratch magnet. The stock leather strap is also described as stiff. Overall, owners rate the Hamilton American Classic Day Date Auto highly for its attractive vintage styling and functional day-date complication at an accessible price.

Grand Seiko SBGR321

Grand Seiko SBGR321 owners and reviewers widely praise its attractive design, compelling dimensions, and robust movement. The watch features sharp case lines with contrasting brushing and polishing, a 40mm steel case that provides presence without bulk, and 100m water resistance. Its sunburst blue dial, inspired by the dawn sky over Mount Iwate, showcases Grand Seiko's signature finishing on applied markers and hands, with a red-tipped seconds hand. The 9S65 automatic movement is noted for its precision, running within specifications, with one source reporting a +5 to -3 seconds a day rate and a 3-day power reserve. A blue rotor with a crimson rim, also inspired by Mount Iwate, is visible through the display caseback. On balance, owners and reviewers rate the Grand Seiko SBGR321 highly for its exceptional finishing and compelling blue dial design at its price point.

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