Side by side

Aera Instruments M-1vsGrand Seiko SBGA384

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

M-1
Aera InstrumentsM-1
SBGA384
Grand SeikoSBGA384
MSRP $29,500

At a glance

13 of 29 specs differ
Diameter
M-139mm
SBGA38440mm
Power Reserve
M-142h
SBGA38472h
Water Resistance
M-1100m
SBGA384100m
MSRP
M-1—
SBGA384$29,500

Full specifications

Case

6 specs
Category
—
Dress
Diameter
39mm
40mm
Thickness
13.14mm
12.5mm
Lug-to-Lug
47.6mm
46.2mm
Lug Width
20mm
19mm
Material
Stainless Steel
Gold

Crystal & Dial

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

Movement

3 specs
Caliber
Sellita SW216-1
9R15
Type
Manual
Spring Drive
Power Reserve
42h
72h

Pricing

1 specs
MSRP
—
$29,500

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