Side by side

Aera Instruments M-1vsGrand Seiko SBGW258

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

M-1
Aera InstrumentsM-1
SBGW258
Grand SeikoSBGW258
MSRP $26,000

At a glance

13 of 29 specs differ
Diameter
M-139mm
SBGW25838mm
Power Reserve
M-142h
SBGW25872h
Water Resistance
M-1100m
SBGW25830m
MSRP
M-1—
SBGW258$26,000

Full specifications

Case

7 specs
Category
—
Dress
Diameter
39mm
38mm
Thickness
13.14mm
10.9mm
Lug-to-Lug
47.6mm
45.8mm
Lug Width
20mm
19mm
Material
Stainless Steel
Gold
Water Resistance
100m
30m

Crystal & Dial

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

Movement

2 specs
Caliber
Sellita SW216-1
9S64
Power Reserve
42h
72h

Pricing

1 specs
MSRP
—
$26,000

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