Which is cheaper, the Serica Ref. 5330 Diving Chronometer Date or the Formex Reef 39.5 mm?

At MSRP the Serica Ref. 5330 Diving Chronometer Date is the cheaper of the two at $2,005, against $2,230 for the Formex Reef 39.5 mm — a $225 gap before any retailer discounting.

Which is bigger, the Serica Ref. 5330 Diving Chronometer Date or the Formex Reef 39.5 mm?

The Formex Reef 39.5 mm wears larger at 39.5mm versus 39mm for the Serica Ref. 5330 Diving Chronometer Date — a 0.5mm difference across the dial.

Which has a longer power reserve, the Serica Ref. 5330 Diving Chronometer Date or the Formex Reef 39.5 mm?

The Formex Reef 39.5 mm carries a 56-hour power reserve against 42 hours on the Serica Ref. 5330 Diving Chronometer Date.

What movement does the Serica Ref. 5330 Diving Chronometer Date run compared to the Formex Reef 39.5 mm?

Both watches run automatic movements — the Serica Ref. 5330 Diving Chronometer Date uses the SoProd M100 and the Formex Reef 39.5 mm uses the Sellita SW300-1.

Side by side

Serica Ref. 5330 Diving Chronometer DatevsFormex Reef 39.5 mm

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

Serica Ref. 5330 Diving Chronometer Date

5330-chronometre-plongee-date

MSRP $2,005

Formex Reef 39.5 mm

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

MSRP $2,230

At a glance

10 of 29 specs differ

Diameter

Ref. 5330 Diving Chronometer Date39mm

Reef 39.5 mm39.5mm

Power Reserve

Ref. 5330 Diving Chronometer Date42h

Reef 39.5 mm56h

Water Resistance

Ref. 5330 Diving Chronometer Date300m

Reef 39.5 mm300m

MSRP

Ref. 5330 Diving Chronometer Date$2,005

Reef 39.5 mm$2,230

Full specifications

Case

4 specs

Diameter

39mm

39.5mm

Thickness

12.2mm

11mm

Lug-to-Lug

46.5mm

45.5mm

Lug Width

20mm

22mm

Crystal & Dial

2 specs

AR Coating

Yes

Inner

Dial Color

Black

Bahama Blue

Movement

3 specs

Caliber

SoProd M100

Sellita SW300-1

Power Reserve

42h

56h

Complications

COSC, Date

None

Pricing

1 specs

MSRP

$2,005

$2,230

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