Side by side

Bremont Supermarine 300MvsSeiko 5 Sports SNXS series

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

Supermarine 300M
BremontSupermarine 300M
MSRP $3,550
5 Sports SNXS series
Seiko5 Sports SNXS series
MSRP $415

At a glance

15 of 29 specs differ
Diameter
Supermarine 300M40mm
5 Sports SNXS series37.4mm
Power Reserve
Supermarine 300M40h
5 Sports SNXS series41h
Water Resistance
Supermarine 300M300m
5 Sports SNXS series100m
MSRP
Supermarine 300M$3,550
5 Sports SNXS series$415

Full specifications

Case

7 specs
Category
Diver
Sport
Diameter
40mm
37.4mm
Thickness
12mm
12.5mm
Lug-to-Lug
44.7mm
Lug Width
20mm
18mm
Material
904L Stainless Steel
Stainless Steel
Water Resistance
300m
100m

Crystal & Dial

4 specs
Crystal
Sapphire
Hardlex
Crystal Shape
Flat
Curved
Dial Color
Green
Black
Lume
None
LumiBrite on hands and index(es)

Movement

3 specs
Caliber
BE-92AE
4R36
Power Reserve
40h
41h
Jewels
25
24

Pricing

1 specs
MSRP
$3,550
$415

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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.

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.

Seiko 5 Sports SNXS series

Owners widely praise the Seiko 5 Sports SNXS series for its attractive sunburst dials, vintage aesthetic, and excellent value, with many highlighting its comfortable wearability. Reviewers and owners consistently flag the stock bracelet as a significant weakness, often described as jangly, hair-pulling, and difficult to adjust, with a flimsy clasp. The Hardlex crystal is noted as being prone to scratching, and the caseback is described as thick, contributing to a bulky appearance. Accuracy with the movement is reported to be variable, ranging from +/- 1-2 seconds per day to +/- 20 seconds or more, and the movement itself lacks hacking and hand-winding. On balance, owners and reviewers rate the Seiko 5 Sports SNXS series highly for its stunning dials and value, despite significant criticisms of its bracelet and movement limitations.

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