Side by side

Aera Instruments M-1vsNivada Grenchen F77 MK2 41mm Automatic

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

M-1
Aera InstrumentsM-1
F77 MK2 41mm Automatic
Nivada GrenchenF77 MK2 41mm Automatic
MSRP $1,460

At a glance

13 of 29 specs differ
Diameter
M-139mm
F77 MK2 41mm Automatic41mm
Power Reserve
M-142h
F77 MK2 41mm Automatic38h
Water Resistance
M-1100m
F77 MK2 41mm Automatic100m
MSRP
M-1—
F77 MK2 41mm Automatic$1,460

Full specifications

Case

6 specs
Category
—
Sport
Diameter
39mm
41mm
Thickness
13.14mm
12.2mm
Lug-to-Lug
47.6mm
46.2mm
Lug Width
20mm
22mm
Caseback
Solid
316L Steel Caseback

Crystal & Dial

2 specs
AR Coating
Inner
Underside
Dial Color
Dune
Meteorite

Movement

4 specs
Caliber
Sellita SW216-1
Soprod M100
Type
Manual
Automatic
Beat Rate
28,800 vph
28 vph
Power Reserve
42h
38h

Pricing

1 specs
MSRP
—
$1,460

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