Side by side

Breitling Chronomat B01 42vsSeiko Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch

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

Chronomat B01 42
BreitlingChronomat B01 42
MSRP $24,600
What people say

Owners + reviewers, side by side

Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.

Breitling Chronomat B01 42

Owners widely praise the Breitling Chronomat B01 42 for its excellent finishing, refined Rouleaux bracelet, and the robust B01 movement. The dial finishing, particularly on copper and copper variants, is highlighted for its dynamic sunburst effect. Some owners consider it an "all-in-one watch" suitable for daily wear due to its ruggedness and chronograph complication. However, multiple sources note that the 42mm case wears larger than its stated size, with a long lug-to-lug distance making it feel closer to 44mm and potentially too large for smaller wrists. The polished bezel is also mentioned as a fingerprint magnet, and one owner reported a magnetized example running significantly fast before demagnetization. On balance, owners and reviewers appreciate the Breitling Chronomat B01 42 for its impressive build quality and distinctive design, despite its substantial wrist presence.

Seiko Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch

The Seiko Prospex Marinemaster 1968 Heritage Diver's Watch is widely praised for its excellent quality and finishing, with reviewers and owners noting its GS-level craftsmanship and Zaratsu-inspired polishing. Owners appreciate its refined design, comfortable case shape, and the 4:00 crown position, with some finding it more manageable on the wrist than other models. The Caliber 8L45 movement offers a 72-hour power reserve and accuracy within -5/+10 seconds per day, and the bracelet features an improved clasp with an extension system. However, some find the price point high, and one reviewer noted the unsigned winding crown as a missed opportunity. On balance, owners and reviewers rate the Seiko Prospex Marinemaster 1968 Heritage Diver's Watch highly for its premium finishing and tool-like appearance at its price point.

At a glance

18 of 29 specs differ
Diameter
Chronomat B01 4242mm
Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch42.6mm
Power Reserve
Chronomat B01 4270h
Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch72h
Water Resistance
Chronomat B01 42200m
Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch300m
MSRP
Chronomat B01 42$24,600
Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch$3,600

Full specifications

Case

8 specs
Diameter
42mm
42.6mm
Thickness
15.1mm
14.1mm
Lug-to-Lug
46mm
49.3mm
Lug Width
22mm
20mm
Material
18kt Pink Gold
Stainless Steel
Finish
Stainless steel
Brushed and polished
Water Resistance
200m
300m
Caseback
Solid

Crystal & Dial

5 specs
Crystal Shape
Curved
AR Coating
Anti-reflective coating on inner surface
Dial Color
Black
Indices
Applied
Lume
None
LumiBrite on hands, index(es) and bezel

Movement

4 specs
Caliber
Breitling B01
8L45
Beat Rate
0 vph
28,800 vph
Power Reserve
70h
72h
Jewels
0
35

Pricing

1 specs
MSRP
$24,600
$3,600
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