Side by side

Bremont Supermarine 300MvsSpinnaker Cahill Automatic

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

Supermarine 300M
BremontSupermarine 300M
MSRP $3,550
Cahill Automatic
SpinnakerCahill Automatic
MSRP $350

At a glance

8 of 29 specs differ
Diameter
Supermarine 300M40mm
Cahill Automatic42mm
Power Reserve
Supermarine 300M40h
Cahill Automatic40h
Water Resistance
Supermarine 300M300m
Cahill Automatic200m
MSRP
Supermarine 300M$3,550
Cahill Automatic$350

Full specifications

Case

6 specs
Diameter
40mm
42mm
Thickness
12mm
13.7mm
Lug-to-Lug
51mm
Lug Width
20mm
22mm
Material
904L Stainless Steel
316L Stainless Steel
Water Resistance
300m
200m

Movement

1 specs
Caliber
BE-92AE
SII NH35A

Pricing

1 specs
MSRP
$3,550
$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.

Spinnaker Cahill Automatic

Owners widely praise the Spinnaker Cahill Automatic for its attractive vintage-inspired design, comfortable wearability on smaller wrists, and good timekeeping, with one owner specifically noting the large "maxi" indices and NATO strap as highlights. However, some find the lume application uneven and note the use of a mineral crystal. A significant concern raised by one owner is a report of internal component failures and a perceived lack of quality control within the brand. On balance, the Spinnaker Cahill Automatic is well-regarded by owners for its style and value, particularly at specific price points, despite some noted manufacturing inconsistencies.

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