Side by side
Aera Instruments M-1vsLongines ULTRA-CHRON CLASSIC
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
20 of 29 specs differDiameter
M-139mm
ULTRA-CHRON CLASSIC37mm
Power Reserve
M-142h
ULTRA-CHRON CLASSIC52h
Water Resistance
M-1100m
ULTRA-CHRON CLASSIC50m
MSRP
M-1—
ULTRA-CHRON CLASSIC$3,900
Full specifications
Case
7 specsDiameter
39mm
37mm
Thickness
13.14mm
10.95mm
Lug-to-Lug
47.6mm
44.6mm
Lug Width
20mm
19mm
Finish
Brushed and polished
—
Water Resistance
100m
50m
Caseback
Solid
Screw-down case back
Crystal & Dial
4 specsCrystal Shape
Flat
—
AR Coating
Inner
Both sides
Dial Color
Dune
Silver
Indices
Applied
Applied indexes
Movement
8 specsCaliber
Sellita SW216-1
L836.6
Type
Manual
Automatic
Beat Rate
28,800 vph
36,000 vph
Power Reserve
42h
52h
Jewels
25
0
Hacking
Yes
No
Hand-winding
Yes
No
Complications
None
Hours, minutes, seconds and date
Pricing
1 specsMSRP
—
$3,900
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