Which is bigger, the Aera Instruments M-1 or the Cincinnati Watch Company P-40 A-11 Pilot?

The Aera Instruments M-1 wears larger at 39mm versus 38mm for the Cincinnati Watch Company P-40 A-11 Pilot — a 1mm difference across the dial.

Which has a longer power reserve, the Aera Instruments M-1 or the Cincinnati Watch Company P-40 A-11 Pilot?

The Cincinnati Watch Company P-40 A-11 Pilot carries a 65-hour power reserve against 42 hours on the Aera Instruments M-1.

What movement does the Aera Instruments M-1 run compared to the Cincinnati Watch Company P-40 A-11 Pilot?

The Aera Instruments M-1 runs a manual caliber (Sellita SW216-1), while the Cincinnati Watch Company P-40 A-11 Pilot runs a automatic (Sellita SW200-2 b).

Side by side

Aera Instruments M-1vsCincinnati Watch Company P-40 A-11 Pilot

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

Aera Instruments M-1

Cincinnati Watch Company P-40 A-11 Pilot

p-40-a-11

MSRP $695

At a glance

17 of 29 specs differ

Diameter

M-139mm

P-40 A-11 Pilot38mm

Power Reserve

M-142h

P-40 A-11 Pilot65h

Water Resistance

M-1100m

P-40 A-11 Pilot100m

MSRP

M-1—

P-40 A-11 Pilot$695

Full specifications

Case

7 specs

Crystal & Dial

5 specs

Crystal Shape

Flat

Domed

AR Coating

Inner

Underside

Dial Color

Dune

Brown

Indices

Applied

—

Lume

Super-LumiNova

None

Movement

4 specs

Caliber

Sellita SW216-1

Sellita SW200-2 b

Type

Manual

Automatic

Power Reserve

42h

65h

Jewels

Pricing

1 specs

MSRP

—

$695

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