BA111OD Chapter 5.1 Chrono MagmavsSeiko Prospex SPEEDTIMER Mechanical Chronograph

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Measurements

Catalog photos are all shot at the same flattering size. These aren't: every case below shares one millimeter scale.

BA111OD Chapter 5.1 Chrono Magma at true scale

Chapter 5.1 Chrono Magma

Seiko Prospex SPEEDTIMER Mechanical Chronograph at true scale

Prospex SPEEDTIMER Mechanical Chronograph

Diameter

44mm

42mm

Lug-to-Lug

n/a

49.5mm

Thickness

16.5mm

14.6mm

lowest

Water Resistance

100m

100m

Power Reserve

48h

highest

45h

MSRP

$2,120

lowest

$2,500

Movement

Valjoux 7750

Seiko 8R48

Case

4 specs
Diameter
44mm
42mm
Thickness
16.5mm
14.6mm
Lug-to-Lug
n/a
49.5mm
Lug Width
n/a
20mm

Crystal & Dial

4 specs
Crystal Shape
n/a
Curved
AR Coating
n/a
Anti-reflective coating on inner surface
Dial Color
n/a
n/a
Lume
None
LumiBrite on hands and index(es)

Movement

3 specs
Caliber
Valjoux 7750
Seiko 8R48
Power Reserve
48h
45h
Jewels
0
34

Pricing

1 specs
MSRP
$2,120
$2,500
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