Side by side

Aera Instruments M-1vsDuckworth Prestex Original Automatic

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

Original Automatic
Duckworth PrestexOriginal Automatic
MSRP $775

At a glance

9 of 29 specs differ
Diameter
M-139mm
Original Automatic39mm
Power Reserve
M-142h
Original Automatic40h
Water Resistance
M-1100m
Original Automatic200m
MSRP
M-1
Original Automatic$775

Full specifications

Case

3 specs
Thickness
13.14mm
11mm
Lug-to-Lug
47.6mm
46.5mm
Water Resistance
100m
200m

Crystal & Dial

2 specs
Dial Color
Dune
Lume
Super-LumiNova
None

Movement

3 specs
Caliber
Sellita SW216-1
Miyota 82S5
Type
Manual
Automatic
Power Reserve
42h
40h

Pricing

1 specs
MSRP
$775
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