Side by side

Bremont Supermarine 300MvsLongines HYDROCONQUEST GMT

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

Supermarine 300M
BremontSupermarine 300M
MSRP $3,550
HYDROCONQUEST GMT
LonginesHYDROCONQUEST GMT
MSRP $3,350

At a glance

7 of 29 specs differ
Diameter
Supermarine 300M40mm
HYDROCONQUEST GMT41mm
Power Reserve
Supermarine 300M40h
HYDROCONQUEST GMT40h
Water Resistance
Supermarine 300M300m
HYDROCONQUEST GMT300m
MSRP
Supermarine 300M$3,550
HYDROCONQUEST GMT$3,350

Full specifications

Case

5 specs
Diameter
40mm
41mm
Thickness
12mm
12.9mm
Lug-to-Lug
49.4mm
Lug Width
20mm
21mm
Material
904L Stainless Steel
Stainless Steel

Movement

1 specs
Caliber
BE-92AE
L844.5

Pricing

1 specs
MSRP
$3,550
$3,350

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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.

Longines HYDROCONQUEST GMT

Owners widely praise the Longines HYDROCONQUEST GMT for its excellent finishing, smooth winding action, and overall value, with some finding its build quality and colorways superior to higher-priced competitors. Reviewers and owners alike note its robustness as a traveler's dive watch with a true GMT movement. Some owners find the round markers at 6 and 9 disrupt dial symmetry, and the GMT hour markers are described as tiny and difficult to read. The date wheel can be mismatched on certain dial colors, and the bracelet clasp is noted as sharp by one reviewer. While some owners wish for a smaller case size, others find the 41mm comfortable. The bezel action is flagged as having bounce-back by one owner, though the brushed finish effectively hides wear. Overall, owners and reviewers rate the Longines HYDROCONQUEST GMT highly for its robust build and excellent value proposition.

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