Which is cheaper, the Serica Ref. 5303 Diving Chronometer or the Smith & Bradley Atlantis A2 Auto?

At MSRP the Smith & Bradley Atlantis A2 Auto is the cheaper of the two at $789, against $1,768 for the Serica Ref. 5303 Diving Chronometer — a $979 gap before any retailer discounting.

Which is bigger, the Serica Ref. 5303 Diving Chronometer or the Smith & Bradley Atlantis A2 Auto?

The Smith & Bradley Atlantis A2 Auto wears larger at 44mm versus 39mm for the Serica Ref. 5303 Diving Chronometer — a 5mm difference across the dial.

Which has a longer power reserve, the Serica Ref. 5303 Diving Chronometer or the Smith & Bradley Atlantis A2 Auto?

The Serica Ref. 5303 Diving Chronometer carries a 42-hour power reserve against 38 hours on the Smith & Bradley Atlantis A2 Auto.

What movement does the Serica Ref. 5303 Diving Chronometer run compared to the Smith & Bradley Atlantis A2 Auto?

Both watches run automatic movements — the Serica Ref. 5303 Diving Chronometer uses the M100 COSC and the Smith & Bradley Atlantis A2 Auto uses the Sellita SW200-1.

Side by side

Serica Ref. 5303 Diving ChronometervsSmith & Bradley Atlantis A2 Auto

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

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Serica Ref. 5303 Diving Chronometer

5303-1-diving-chronometer

MSRP $1,768

Smith & Bradley Atlantis A2 Auto

copy-of-atlantis-automatic-watch

MSRP $789

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At a glance

10 of 29 specs differ

Diameter

Ref. 5303 Diving Chronometer39mm

Atlantis A2 Auto44mm

Power Reserve

Ref. 5303 Diving Chronometer42h

Atlantis A2 Auto38h

Water Resistance

Ref. 5303 Diving Chronometer300m

Atlantis A2 Auto300m

MSRP

Ref. 5303 Diving Chronometer$1,768

Atlantis A2 Auto$789

Full specifications

Case

4 specs

Diameter

39mm

44mm

Thickness

12.2mm

12mm

Lug-to-Lug

46.5mm

46mm

Lug Width

20mm

22mm

Crystal & Dial

2 specs

Dial Color

Enamel Black

Black

Lume

Super-LumiNova

None

Movement

3 specs

Caliber

M100 COSC

Sellita SW200-1

Power Reserve

42h

38h

Complications

COSC

None

Pricing

1 specs

MSRP

$1,768

$789

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At a glance

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