Which is bigger, the Aera Instruments M-1 or the Marathon GPQ-D (Officer's Quartz with Date) Field Watch?

The Aera Instruments M-1 wears larger at 39mm versus 36mm for the Marathon GPQ-D (Officer's Quartz with Date) Field Watch — a 3mm difference across the dial.

Which has better water resistance, the Aera Instruments M-1 or the Marathon GPQ-D (Officer's Quartz with Date) Field Watch?

The Aera Instruments M-1 is rated to 100m versus 30m for the Marathon GPQ-D (Officer's Quartz with Date) Field Watch.

Which has a longer power reserve, the Aera Instruments M-1 or the Marathon GPQ-D (Officer's Quartz with Date) Field Watch?

The Aera Instruments M-1 carries a 42-hour power reserve against 40 hours on the Marathon GPQ-D (Officer's Quartz with Date) Field Watch.

What movement does the Aera Instruments M-1 run compared to the Marathon GPQ-D (Officer's Quartz with Date) Field Watch?

The Aera Instruments M-1 runs a manual caliber (Sellita SW216-1), while the Marathon GPQ-D (Officer's Quartz with Date) Field Watch runs a quartz (Swiss High-Torque Quartz (3J, EOL)).

Side by side

Aera Instruments M-1vsMarathon GPQ-D (Officer's Quartz with Date) Field Watch

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

Aera Instruments M-1

Marathon GPQ-D (Officer's Quartz with Date) Field Watch

officers-watch-with-date-gpq-39mm-case-crown-defstan

MSRP $650

At a glance

13 of 29 specs differ

Diameter

M-139mm

GPQ-D (Officer's Quartz with Date) Field Watch36mm

Power Reserve

M-142h

GPQ-D (Officer's Quartz with Date) Field Watch40h

Water Resistance

M-1100m

GPQ-D (Officer's Quartz with Date) Field Watch30m

MSRP

M-1—

GPQ-D (Officer's Quartz with Date) Field Watch$650

Full specifications

Case

7 specs

Crystal & Dial

2 specs

Dial Color

Dune

Black

Lume

Super-LumiNova

None

Movement

3 specs

Caliber

Sellita SW216-1

Swiss High-Torque Quartz (3J, EOL)

Type

Manual

Quartz

Power Reserve

42h

40h

Pricing

1 specs

MSRP

—

$650

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