Side by side

Oris Divers Sixty‑Five Calibre 400vsBremont Supermarine 300M

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

Divers Sixty‑Five Calibre 400
OrisDivers Sixty‑Five Calibre 400
MSRP $4,100
Supermarine 300M
BremontSupermarine 300M
MSRP $3,550

At a glance

15 of 29 specs differ
Diameter
Divers Sixty‑Five Calibre 40038mm
Supermarine 300M40mm
Power Reserve
Divers Sixty‑Five Calibre 400120 hoursh
Supermarine 300M40h
Water Resistance
Divers Sixty‑Five Calibre 400100m
Supermarine 300M300m
MSRP
Divers Sixty‑Five Calibre 400$4,100
Supermarine 300M$3,550

Full specifications

Case

7 specs
Diameter
38mm
40mm
Thickness
12mm
Lug Width
19mm
20mm
Material
Stainless Steel
904L Stainless Steel
Finish
Brushed and polished
Water Resistance
100m
300m
Caseback
Solid

Crystal & Dial

3 specs
Crystal Shape
Flat
AR Coating
Underside
Inner
Indices
Applied

Movement

4 specs
Caliber
400
BE-92AE
Beat Rate
4 vph
28,800 vph
Power Reserve
120 hoursh
40h
Jewels
21
25

Pricing

1 specs
MSRP
$4,100
$3,550

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What people say

Owners + reviewers, side by side

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

Oris Divers Sixty‑Five Calibre 400

Owners and reviewers widely praise the Oris Divers Sixty-Five Calibre 400 for its refined finishing, comfortable bracelet, and the impressive Calibre 400 movement with its 5-day power reserve and 10-year warranty. The domed sapphire crystal and vintage-inspired design, including the tapered bracelet with rivets, are frequently highlighted. Accuracy is reported between +1.6 seconds per day and exceeding the 120-hour power reserve. However, some owners find the $3900 price point high, with one reporting a date wheel failure within a month and significant daily timekeeping issues after repair. The 10atm water resistance rating is also noted as a potential drawback by some. Overall, owners and reviewers rate the Oris Divers Sixty-Five Calibre 400 highly for its upgraded movement and compelling value.

From video reviewers

The 5-day power reserve of the Calibre 400 movement is a key strength. Reviewers did not reach a consensus on any weaknesses.

Bremont Supermarine 300M

The Bremont Supermarine 300M is praised for its comfortable 40mm and 42mm case sizes, with owners noting the 42mm wears well on smaller wrists due to its lug design. One owner highlights the 13mm thinness of the 40mm case, considered compact for a 300m diver. The watch is priced at $1375. On balance, owners and reviewers appreciate the Bremont Supermarine 300M for its wearability and compact dimensions, especially for a dive watch.

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