Side by side

Bremont ALT1-CvsBremont Supermarine 300M

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

ALT1-C
BremontALT1-C
MSRP $6,150
Supermarine 300M
BremontSupermarine 300M
MSRP $3,550

At a glance

9 of 29 specs differ
Diameter
ALT1-C43mm
Supermarine 300M40mm
Power Reserve
ALT1-C40h
Supermarine 300M40h
Water Resistance
ALT1-C100m
Supermarine 300M300m
MSRP
ALT1-C$6,150
Supermarine 300M$3,550

Full specifications

Case

6 specs
Category
Chronograph
Diver
Diameter
43mm
40mm
Thickness
16mm
12mm
Lug Width
22mm
20mm
Material
316L Stainless Steel
904L Stainless Steel
Water Resistance
100m
300m

Crystal & Dial

1 specs
Dial Color
Regular length (15cm - 19cm wrist size)
Green

Movement

1 specs
Caliber
BE-50AE
BE-92AE

Pricing

1 specs
MSRP
$6,150
$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.

Bremont ALT1-C

Owners widely praise the Bremont ALT1-C for its flawless brushed case finish, attractive cream dial with excellent contrast from anthracite sub-dials, and comfortable, balanced wearability. The watch features a well-finished strap and a movement that is a joy to wind, with precise chronograph operation. Reviewers note refined feuille hands and polished Arabic numerals with a golden tinge, balancing ruggedness with elegance. The Bremont ALT1-C averages +3 seconds per day, though one reviewer flags its 16mm height as less than ideal for under-cuff wear and describes the date window as narrow. The modified Valjoux 7750 movement's rotor spin is noticeable. Overall, owners rate the Bremont ALT1-C highly for its refined aesthetics and enjoyable user experience.

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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