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.

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 and reviewers widely praise the Breitling Chronomat B01 42 for its exceptional fit and finish, with many calling the Rouleaux bracelet a work of art and the case and bracelet feeling like a "little tank." The dial execution is consistently noted as elegant and appealing, with the copper dial specifically highlighted as unique and dynamic. Some owners report excellent timekeeping, with one noting -3 to -2 seconds per day after demagnetization. The watch's styling is described as bold and loud by some, and its 42mm size with a 50.5mm lug-to-lug distance may wear large for some wrists, feeling more substantial than other 42mm watches. The polished bezel is noted as a fingerprint magnet. Overall, owners and reviewers rate the Breitling Chronomat B01 42 highly for its robust build quality and distinctive bracelet design.

Seiko Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch

The Seiko Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch is praised for its premium finishing, often described as Zaratsu-like, and robust build quality, with owners finding its 42mm case and 4 o'clock crown appealing for wearability. Some reviewers note its secondary GMT function and quieter bezel clicks may not suit all preferences, while one owner reported bezel misalignment issues. The watch is powered by the Caliber 8L45 automatic movement, offering a 72-hour power reserve and an accuracy rating of -5/+10 seconds per day, though some owners question its value proposition at its price point. On balance, owners and reviewers rate the Seiko Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch highly for its exceptional finishing and refined tool-like aesthetic.

At a glance

17 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 Watch50h
Water Resistance
Chronomat B01 42200m
Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch300m
MSRP
Chronomat B01 42
Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch$2,900

Full specifications

Case

7 specs
Diameter
42mm
42.6mm
Thickness
15.1mm
13.4mm
Lug-to-Lug
46mm
49.3mm
Lug Width
22mm
20mm
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
8L35
Beat Rate
0 vph
28,800 vph
Power Reserve
70h
50h
Jewels
0
26

Pricing

1 specs
MSRP
$2,900
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