Which is cheaper, the Bremont Altitude Chronograph or the Grand Seiko SBGM245?

At MSRP the Grand Seiko SBGM245 is the cheaper of the two at $6,100, against $6,300 for the Bremont Altitude Chronograph — a $200 gap before any retailer discounting.

Which is bigger, the Bremont Altitude Chronograph or the Grand Seiko SBGM245?

The Bremont Altitude Chronograph wears larger at 42mm versus 40.5mm for the Grand Seiko SBGM245 — a 1.5mm difference across the dial.

Which has better water resistance, the Bremont Altitude Chronograph or the Grand Seiko SBGM245?

The Grand Seiko SBGM245 is rated to 200m versus 100m for the Bremont Altitude Chronograph.

Which has a longer power reserve, the Bremont Altitude Chronograph or the Grand Seiko SBGM245?

The Grand Seiko SBGM245 carries a 72-hour power reserve against 40 hours on the Bremont Altitude Chronograph.

What movement does the Bremont Altitude Chronograph run compared to the Grand Seiko SBGM245?

Both watches run automatic movements — the Bremont Altitude Chronograph uses the BE-50AE and the Grand Seiko SBGM245 uses the 9S66.

Side by side

Bremont Altitude ChronographvsGrand Seiko SBGM245

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

Bremont Altitude Chronograph

alt42-chr-g-ss-si-l-s

MSRP $6,300

Grand Seiko SBGM245

sbgm245g

MSRP $6,100

At a glance

12 of 29 specs differ

Diameter

Altitude Chronograph42mm

SBGM24540.5mm

Power Reserve

Altitude Chronograph40h

SBGM24572h

Water Resistance

Altitude Chronograph100m

SBGM245200m

MSRP

Altitude Chronograph$6,300

SBGM245$6,100

Full specifications

Case

7 specs

Crystal & Dial

2 specs

AR Coating

Inner

Yes

Dial Color

Silver

Black

Movement

2 specs

Caliber

BE-50AE

9S66

Power Reserve

40h

72h

Pricing

1 specs

MSRP

$6,300

$6,100

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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 Altitude Chronograph

Owners note faint marks on the case sides and back, with minor wear and creasing on the strap. Reviewers flag the "DANGER EJECTION SEAT" wordmark on the dial as a divisive design choice that disrupts the MB series' usual stark tone, though they praise the improved smoothness and click precision of the Roto Click rotating bezel. On balance, the Bremont Altitude Chronograph elicits mixed reactions, with design elements like the dial text being a point of contention for reviewers.

A Blog to Watch

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Grand Seiko SBGM245

Owners widely appreciate the Grand Seiko SBGM245 for its blend of sport and luxury, with one enthusiast highlighting its superior workmanship over quartz movements. However, opinions on its size vary, as one owner found the SBGM245 too large, preferring the comfort of a different variant. Overall, owners value the Grand Seiko SBGM245 for its refined craftsmanship, though its wearability is a point of personal preference.

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