Which is cheaper, the Formex Reef 42 mm or the Grand Seiko SLGW007?

At MSRP the Formex Reef 42 mm is the cheaper of the two at $2,414, against $10,000 for the Grand Seiko SLGW007 — a $7,586 gap before any retailer discounting.

Which is bigger, the Formex Reef 42 mm or the Grand Seiko SLGW007?

The Formex Reef 42 mm wears larger at 42mm versus 38.6mm for the Grand Seiko SLGW007 — a 3.4mm difference across the dial.

Which has better water resistance, the Formex Reef 42 mm or the Grand Seiko SLGW007?

The Formex Reef 42 mm is rated to 300m versus 30m for the Grand Seiko SLGW007.

Which has a longer power reserve, the Formex Reef 42 mm or the Grand Seiko SLGW007?

The Grand Seiko SLGW007 carries a 80-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 SLGW007?

The Formex Reef 42 mm runs a automatic caliber (Sellita SW300-1), while the Grand Seiko SLGW007 runs a manual (9SA4).

Side by side

Formex Reef 42 mmvsGrand Seiko SLGW007

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 SLGW007

slgw007g

MSRP $10,000

At a glance

12 of 29 specs differ

Diameter

Reef 42 mm42mm

SLGW00738.6mm

Power Reserve

Reef 42 mm56h

SLGW00780h

Water Resistance

Reef 42 mm300m

SLGW00730m

MSRP

Reef 42 mm$2,414

SLGW007$10,000

Full specifications

Case

6 specs

Crystal & Dial

2 specs

AR Coating

Inner

Yes

Lume

Super-LumiNova

None

Movement

3 specs

Caliber

Sellita SW300-1

9SA4

Type

Automatic

Manual

Power Reserve

56h

80h

Pricing

1 specs

MSRP

$2,414

$10,000

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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 SLGW007 owners and reviewers praise its compact 38.6mm x 9.95mm Evolution 9 case and the textured "Moonlit Birch" dial, described as moody, elegant, and captivating. The technically credible 9SA4 hand-wound movement with an 80-hour power reserve is also highlighted. Its 30m water resistance and lack of lume are noted as appropriate for a dress watch. Overall, owners and reviewers rate the Grand Seiko SLGW007 highly for its refined case, captivating dial, and updated movement.

Time + Tide

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