Side by side

Aera Instruments M-1vsDecima Gatekeeper

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

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M-1
Aera InstrumentsM-1
Gatekeeper
DecimaGatekeeper
MSRP $599
Buy from Aera Instruments ↗
Buy used on eBay ↗
Buy from Decima ↗
Buy used on eBay ↗

At a glance

11 of 29 specs differ
Diameter
M-139mm
Gatekeeper38mm
Power Reserve
M-142h
Gatekeeper42h
Water Resistance
M-1100m
Gatekeeper50m
MSRP
M-1—
Gatekeeper$599

Full specifications

Case

5 specs
Diameter
39mm
38mm
Thickness
13.14mm
9.9mm
Lug-to-Lug
47.6mm
46mm
Lug Width
20mm
—
Water Resistance
100m
50m

Crystal & Dial

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

Movement

2 specs
Caliber
Sellita SW216-1
Miyota 9039
Type
Manual
Automatic

Pricing

1 specs
MSRP
—
$599
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