Which is cheaper, the Formex Reef 39.5 mm or the Grand Seiko SBGX363?

At MSRP the Formex Reef 39.5 mm is the cheaper of the two at $2,230, against $3,600 for the Grand Seiko SBGX363 — a $1,370 gap before any retailer discounting.

Which is bigger, the Formex Reef 39.5 mm or the Grand Seiko SBGX363?

The Formex Reef 39.5 mm wears larger at 39.5mm versus 32.3mm for the Grand Seiko SBGX363 — a 7.2mm difference across the dial.

Which has better water resistance, the Formex Reef 39.5 mm or the Grand Seiko SBGX363?

The Formex Reef 39.5 mm is rated to 300m versus 100m for the Grand Seiko SBGX363.

Which has a longer power reserve, the Formex Reef 39.5 mm or the Grand Seiko SBGX363?

The Formex Reef 39.5 mm carries a 56-hour power reserve against 40 hours on the Grand Seiko SBGX363.

What movement does the Formex Reef 39.5 mm run compared to the Grand Seiko SBGX363?

The Formex Reef 39.5 mm runs a automatic caliber (Sellita SW300-1), while the Grand Seiko SBGX363 runs a quartz (9F51).

Side by side

Formex Reef 39.5 mmvsGrand Seiko SBGX363

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

Formex Reef 39.5 mm

reef-39.5-automatic-chronometer-cosc-300m-bahama-blue

MSRP $2,230

Grand Seiko SBGX363

sbgx363g

MSRP $3,600

At a glance

13 of 29 specs differ

Diameter

Reef 39.5 mm39.5mm

SBGX36332.3mm

Power Reserve

Reef 39.5 mm56h

SBGX36340h

Water Resistance

Reef 39.5 mm300m

SBGX363100m

MSRP

Reef 39.5 mm$2,230

SBGX363$3,600

Full specifications

Case

6 specs

Crystal & Dial

3 specs

AR Coating

Inner

Yes

Dial Color

Bahama Blue

Black

Lume

Super-LumiNova

None

Movement

3 specs

Caliber

Sellita SW300-1

9F51

Type

Automatic

Quartz

Power Reserve

56h

40h

Pricing

1 specs

MSRP

$2,230

$3,600

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Formex Reef 39.5 mmvsGrand Seiko SBGX363

At a glance

Full specifications

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