Which is cheaper, the Serica Ref. 5303 Diving Chronometer or the Oblvlo RX Day-Date?

At MSRP the Oblvlo RX Day-Date is the cheaper of the two at $336, against $1,768 for the Serica Ref. 5303 Diving Chronometer — a $1,432 gap before any retailer discounting.

Which is bigger, the Serica Ref. 5303 Diving Chronometer or the Oblvlo RX Day-Date?

The Oblvlo RX Day-Date wears larger at 40mm versus 39mm for the Serica Ref. 5303 Diving Chronometer — a 1mm difference across the dial.

Which has better water resistance, the Serica Ref. 5303 Diving Chronometer or the Oblvlo RX Day-Date?

The Serica Ref. 5303 Diving Chronometer is rated to 300m versus 50m for the Oblvlo RX Day-Date.

Which has a longer power reserve, the Serica Ref. 5303 Diving Chronometer or the Oblvlo RX Day-Date?

The Oblvlo RX Day-Date carries a 42-hour power reserve against 42 hours on the Serica Ref. 5303 Diving Chronometer.

What movement does the Serica Ref. 5303 Diving Chronometer run compared to the Oblvlo RX Day-Date?

Both watches run automatic movements — the Serica Ref. 5303 Diving Chronometer uses the M100 COSC and the Oblvlo RX Day-Date uses the Miyota 8285.

Side by side

Serica Ref. 5303 Diving ChronometervsOblvlo RX Day-Date

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

Serica Ref. 5303 Diving Chronometer

5303-1-diving-chronometer

MSRP $1,768

Oblvlo RX Day-Date

RX-DD-AD

MSRP $336

At a glance

14 of 29 specs differ

Diameter

Ref. 5303 Diving Chronometer39mm

RX Day-Date40mm

Power Reserve

Ref. 5303 Diving Chronometer42h

RX Day-Date42h

Water Resistance

Ref. 5303 Diving Chronometer300m

RX Day-Date50m

MSRP

Ref. 5303 Diving Chronometer$1,768

RX Day-Date$336

Full specifications

Case

6 specs

Crystal & Dial

3 specs

AR Coating

Yes

Inner

Dial Color

Enamel Black

Black

Lume

Super-LumiNova

None

Movement

4 specs

Caliber

M100 COSC

Miyota 8285

Power Reserve

42h

Jewels

Complications

COSC

Day, Date

Pricing

1 specs

MSRP

$1,768

$336

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