Which is cheaper, the Formex Reef 39.5 mm or the Sartory Billard SB04-E?

At MSRP the Formex Reef 39.5 mm is the cheaper of the two at $2,230, against $3,100 for the Sartory Billard SB04-E — a $870 gap before any retailer discounting.

Which has better water resistance, the Formex Reef 39.5 mm or the Sartory Billard SB04-E?

The Formex Reef 39.5 mm is rated to 300m versus 100m for the Sartory Billard SB04-E.

Which has a longer power reserve, the Formex Reef 39.5 mm or the Sartory Billard SB04-E?

The Sartory Billard SB04-E carries a 68-hour power reserve against 56 hours on the Formex Reef 39.5 mm.

What movement does the Formex Reef 39.5 mm run compared to the Sartory Billard SB04-E?

Both watches run automatic movements — the Formex Reef 39.5 mm uses the Sellita SW300-1 and the Sartory Billard SB04-E uses the LJP G101ET.

Side by side

Formex Reef 39.5 mmvsSartory Billard SB04-E

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

Sartory Billard SB04-E

MSRP $3,100

At a glance

12 of 29 specs differ

Diameter

Reef 39.5 mm39.5mm

SB04-E39.5mm

Power Reserve

Reef 39.5 mm56h

SB04-E68h

Water Resistance

Reef 39.5 mm300m

SB04-E100m

MSRP

Reef 39.5 mm$2,230

SB04-E$3,100

Full specifications

Case

5 specs

Crystal & Dial

3 specs

AR Coating

Inner

Yes

Dial Color

Bahama Blue

Black

Lume

Super-LumiNova

Super-LumiNova BGW9

Movement

3 specs

Caliber

Sellita SW300-1

LJP G101ET

Power Reserve

56h

68h

Jewels

Pricing

1 specs

MSRP

$2,230

$3,100

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