Side by side

Hamilton American Classic Intra-Matic AutovsGrand Seiko SBGR321

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

American Classic Intra-Matic Auto
HamiltonAmerican Classic Intra-Matic Auto
MSRP $1,275
SBGR321
Grand SeikoSBGR321
MSRP $5,200

At a glance

8 of 29 specs differ
Diameter
American Classic Intra-Matic Auto40mm
SBGR32140mm
Power Reserve
American Classic Intra-Matic Auto80h
SBGR32172h
Water Resistance
American Classic Intra-Matic Auto50m
SBGR321100m
MSRP
American Classic Intra-Matic Auto$1,275
SBGR321$5,200

Full specifications

Case

3 specs
Thickness
10.95mm
13mm
Lug-to-Lug
46mm
46.6mm
Water Resistance
50m
100m

Crystal & Dial

2 specs
AR Coating
Inner
Yes
Dial Color
White
Black

Movement

2 specs
Caliber
H-10
9S65
Power Reserve
80h
72h

Pricing

1 specs
MSRP
$1,275
$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 Intra-Matic Auto

Owners widely praise the Hamilton American Classic Intra-Matic Auto for its thinness, perfect size, and vintage charm, with some preferring its contrasting tachymeter and larger subdials. One owner notes the rotor can be quite loud. The Hamilton American Classic Intra-Matic Auto is considered by some to be the best watch with a 2892 movement for the price. Overall, owners rate the Hamilton American Classic Intra-Matic Auto highly for its vintage charm and wearability at the 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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