Side by side

Aera Instruments M-1vsGrand Seiko SBGR321

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

M-1
Aera InstrumentsM-1
SBGR321
Grand SeikoSBGR321
MSRP $5,200

At a glance

11 of 29 specs differ
Diameter
M-139mm
SBGR32140mm
Power Reserve
M-142h
SBGR32172h
Water Resistance
M-1100m
SBGR321100m
MSRP
M-1—
SBGR321$5,200

Full specifications

Case

4 specs
Category
—
Dress
Diameter
39mm
40mm
Thickness
13.14mm
13mm
Lug-to-Lug
47.6mm
46.6mm

Crystal & Dial

3 specs
AR Coating
Inner
Yes
Dial Color
Dune
Black
Lume
Super-LumiNova
None

Movement

3 specs
Caliber
Sellita SW216-1
9S65
Type
Manual
Automatic
Power Reserve
42h
72h

Pricing

1 specs
MSRP
—
$5,200

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