Which is bigger, the Aera Instruments M-1 or the Nivada Grenchen Chronomaster Valjoux?

The Aera Instruments M-1 wears larger at 39mm versus 38mm for the Nivada Grenchen Chronomaster Valjoux — a 1mm difference across the dial.

Which has a longer power reserve, the Aera Instruments M-1 or the Nivada Grenchen Chronomaster Valjoux?

The Nivada Grenchen Chronomaster Valjoux carries a 48-hour power reserve against 42 hours on the Aera Instruments M-1.

What movement does the Aera Instruments M-1 run compared to the Nivada Grenchen Chronomaster Valjoux?

Both watches run manual movements — the Aera Instruments M-1 uses the Sellita SW216-1 and the Nivada Grenchen Chronomaster Valjoux uses the Valjoux 23.

Side by side

Aera Instruments M-1vsNivada Grenchen Chronomaster Valjoux

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

Aera Instruments M-1

Nivada Grenchen Chronomaster Valjoux

Chronomaster Valjoux

MSRP $5,000

At a glance

11 of 29 specs differ

Diameter

M-139mm

Chronomaster Valjoux38mm

Power Reserve

M-142h

Chronomaster Valjoux48h

Water Resistance

M-1100m

Chronomaster Valjoux100m

MSRP

M-1—

Chronomaster Valjoux$5,000

Full specifications

Case

6 specs

Crystal & Dial

1 specs

Dial Color

Dune

Black

Movement

3 specs

Caliber

Sellita SW216-1

Valjoux 23

Power Reserve

42h

48h

Complications

None

GMT, Chronograph

Pricing

1 specs

MSRP

—

$5,000

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