Side by side

Aera Instruments M-1vsOrient Helios

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

M-1
Aera InstrumentsM-1
Helios
OrientHelios
MSRP $335

At a glance

19 of 29 specs differ
Diameter
M-139mm
Helios40.5mm
Power Reserve
M-142h
Helios40h
Water Resistance
M-1100m
Helios30m
MSRP
M-1—
Helios$335

Full specifications

Case

7 specs
Category
—
—
Diameter
39mm
40.5mm
Thickness
13.14mm
12mm
Lug-to-Lug
47.6mm
47mm
Lug Width
20mm
21mm
Water Resistance
100m
30m
Caseback
Solid
Display

Crystal & Dial

6 specs
Crystal
Sapphire
Mineral
Crystal Shape
Flat
—
AR Coating
Inner
—
Dial Color
Dune
Green
Indices
Applied
—
Lume
Super-LumiNova
None

Movement

5 specs
Caliber
Sellita SW216-1
FT622
Type
Manual
Automatic
Beat Rate
28,800 vph
21,600 vph
Power Reserve
42h
40h
Jewels
25
22

Pricing

1 specs
MSRP
—
$335

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