Side by side

Aera Instruments M-1vsGrand Seiko SBGM221

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

M-1
Aera InstrumentsM-1
SBGM221
Grand SeikoSBGM221
MSRP $5,400

At a glance

13 of 29 specs differ
Diameter
M-139mm
SBGM22139.5mm
Power Reserve
M-142h
SBGM22172h
Water Resistance
M-1100m
SBGM22130m
MSRP
M-1—
SBGM221$5,400

Full specifications

Case

6 specs
Category
—
GMT
Diameter
39mm
39.5mm
Thickness
13.14mm
13.7mm
Lug-to-Lug
47.6mm
46.9mm
Lug Width
20mm
19mm
Water Resistance
100m
30m

Crystal & Dial

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

Movement

3 specs
Caliber
Sellita SW216-1
9S66
Type
Manual
Automatic
Power Reserve
42h
72h

Pricing

1 specs
MSRP
—
$5,400

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