Which is cheaper, the Formex Reef 42 mm or the Grand Seiko SBGA413?

At MSRP the Formex Reef 42 mm is the cheaper of the two at $2,414, against $7,200 for the Grand Seiko SBGA413 — a $4,786 gap before any retailer discounting.

Which is bigger, the Formex Reef 42 mm or the Grand Seiko SBGA413?

The Formex Reef 42 mm wears larger at 42mm versus 40mm for the Grand Seiko SBGA413 — a 2mm difference across the dial.

Which has better water resistance, the Formex Reef 42 mm or the Grand Seiko SBGA413?

The Formex Reef 42 mm is rated to 300m versus 100m for the Grand Seiko SBGA413.

Which has a longer power reserve, the Formex Reef 42 mm or the Grand Seiko SBGA413?

The Grand Seiko SBGA413 carries a 72-hour power reserve against 56 hours on the Formex Reef 42 mm.

What movement does the Formex Reef 42 mm run compared to the Grand Seiko SBGA413?

The Formex Reef 42 mm runs a automatic caliber (Sellita SW300-1), while the Grand Seiko SBGA413 runs a spring drive (9R65).

Side by side

Formex Reef 42 mmvsGrand Seiko SBGA413

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

Formex Reef 42 mm

reef-42mm-automatic-cosc-300m-black

MSRP $2,414

Grand Seiko SBGA413

sbga413g

MSRP $7,200

At a glance

12 of 29 specs differ

Diameter

Reef 42 mm42mm

SBGA41340mm

Power Reserve

Reef 42 mm56h

SBGA41372h

Water Resistance

Reef 42 mm300m

SBGA413100m

MSRP

Reef 42 mm$2,414

SBGA413$7,200

Full specifications

Case

6 specs

Crystal & Dial

2 specs

AR Coating

Inner

Yes

Lume

Super-LumiNova

None

Movement

3 specs

Caliber

Sellita SW300-1

9R65

Type

Automatic

Spring Drive

Power Reserve

56h

72h

Pricing

1 specs

MSRP

$2,414

$7,200

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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.

Formex Reef 42 mm

The Formex Reef 42 mm is widely praised for its comfortable bracelet featuring a micro-adjust clasp, COSC-certified Sellita movement, and excellent build quality. Owners appreciate the gradient dial's visual appeal and the overall wearability. Some owners note the seconds hand does not perfectly align with markers, and one owner found the lugs' taper hinders third-party strap fit. The bracelet's length and sporty design are noted as limiting versatility by some. On balance, owners and reviewers rate the Formex Reef 42 mm highly for its impressive wearability and value at the price point.

Grand Seiko SBGA413 owners and reviewers widely praise its captivating dial, particularly its subtle artistry, and the mesmerizing Spring Drive movement's reliability and unparalleled mechanical accuracy, with some noting their Spring Drive watches run within half a second per day. The 40mm titanium case, featuring intricate geometries and a satin brush finish, is also highlighted, as are the Zaratsu-polished surfaces. Legibility is considered excellent, even with silver hands on the pink dial. On balance, owners and reviewers rate the Grand Seiko SBGA413 highly for its beautiful dial and the Spring Drive movement's accuracy and refinement.

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