Which is bigger, the Aera Instruments M-1 or the Seestern S443 Column Wheel Chronograph?

The Seestern S443 Column Wheel Chronograph wears larger at 40mm versus 39mm for the Aera Instruments M-1 — a 1mm difference across the dial.

Which has better water resistance, the Aera Instruments M-1 or the Seestern S443 Column Wheel Chronograph?

The Aera Instruments M-1 is rated to 100m versus 50m for the Seestern S443 Column Wheel Chronograph.

Which has a longer power reserve, the Aera Instruments M-1 or the Seestern S443 Column Wheel Chronograph?

The Seestern S443 Column Wheel Chronograph carries a 45h-hour power reserve against 42 hours on the Aera Instruments M-1.

What movement does the Aera Instruments M-1 run compared to the Seestern S443 Column Wheel Chronograph?

Both watches run manual movements — the Aera Instruments M-1 uses the Sellita SW216-1 and the Seestern S443 Column Wheel Chronograph uses the Seagull ST1901.

Side by side

Aera Instruments M-1vsSeestern S443 Column Wheel Chronograph

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

Aera Instruments M-1

Seestern S443 Column Wheel Chronograph

S443.P

MSRP $10

At a glance

15 of 29 specs differ

Diameter

M-139mm

S443 Column Wheel Chronograph40mm

Power Reserve

M-142h

S443 Column Wheel Chronograph45hh

Water Resistance

M-1100m

S443 Column Wheel Chronograph50m

MSRP

M-1—

S443 Column Wheel Chronograph$10

Full specifications

Case

6 specs

Crystal & Dial

3 specs

Dial Color

Dune

Pink

Indices

Applied

Lume

Super-LumiNova

Super BGW9

Movement

5 specs

Caliber

Sellita SW216-1

Seagull ST1901

Beat Rate

28,800 vph

3 vph

Power Reserve

42h

45hh

Jewels

Complications

None

Chronograph, Column Wheel

Pricing

1 specs

MSRP

—

$10

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