Side by side

Bremont Supermarine 300MvsZelos Spearfish GMT

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

Supermarine 300M
BremontSupermarine 300M
MSRP $3,550
Spearfish GMT
ZelosSpearfish GMT
MSRP $999

At a glance

8 of 29 specs differ
Diameter
Supermarine 300M40mm
Spearfish GMT40mm
Power Reserve
Supermarine 300M40h
Spearfish GMT40h
Water Resistance
Supermarine 300M300m
Spearfish GMT200m
MSRP
Supermarine 300M$3,550
Spearfish GMT$999

Full specifications

Case

5 specs
Category
Diver
GMT
Thickness
12mm
13mm
Lug-to-Lug
40mm
Material
904L Stainless Steel
316L Stainless Steel
Water Resistance
300m
200m

Crystal & Dial

1 specs
Dial Color
Green
Frost

Movement

1 specs
Caliber
BE-92AE
Sellita SW330-2

Pricing

1 specs
MSRP
$3,550
$999

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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.

Zelos Spearfish GMT

The Zelos Spearfish GMT is widely praised for its exceptional value, with reviewers highlighting its superb finishing, flawless machining, and a tool-less micro-adjustment clasp that exceeds its price point. It features a La Joux-Perret G100 movement with a 68-hour power reserve, achieving an average accuracy of +2.6 seconds per day, or a Miyota 9075 movement offering flier-style GMT functionality. The 40mm case and bidirectional 48-click ceramic bezel are well-executed, though one reviewer noted a minor compromise in the end link fit. Overall, owners and reviewers rate the Zelos Spearfish GMT highly for its impressive finishing and value proposition.

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