Which is cheaper, the Rockwell Time 40mm2 (2nd Gen) or the Spinnaker Dumas Automatic?

At MSRP the Spinnaker Dumas Automatic is the cheaper of the two at $239, against $320 for the Rockwell Time 40mm2 (2nd Gen) — a $81 gap before any retailer discounting.

Which is bigger, the Rockwell Time 40mm2 (2nd Gen) or the Spinnaker Dumas Automatic?

The Spinnaker Dumas Automatic wears larger at 44mm versus 40mm for the Rockwell Time 40mm2 (2nd Gen) — a 4mm difference across the dial.

Which has better water resistance, the Rockwell Time 40mm2 (2nd Gen) or the Spinnaker Dumas Automatic?

The Spinnaker Dumas Automatic is rated to 300m versus 50m for the Rockwell Time 40mm2 (2nd Gen).

What movement does the Rockwell Time 40mm2 (2nd Gen) run compared to the Spinnaker Dumas Automatic?

The Rockwell Time 40mm2 (2nd Gen) runs a quartz caliber, while the Spinnaker Dumas Automatic runs a automatic (Seiko NH35).

Side by side

Rockwell Time 40mm2 (2nd Gen)vsSpinnaker Dumas Automatic

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

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Rockwell Time 40mm2 (2nd Gen)

MSRP $320

See the full 40mm2 (2nd Gen)

Spinnaker Dumas Automatic

MSRP $239

See the full Dumas Automatic

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Buy used on eBay ↗

Buy from Spinnaker ↗

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At a glance

12 of 29 specs differ

Diameter

40mm2 (2nd Gen)40mm

Dumas Automatic44mm

Power Reserve

40mm2 (2nd Gen)—

Dumas Automatic—

Water Resistance

40mm2 (2nd Gen)50m

Dumas Automatic300m

MSRP

40mm2 (2nd Gen)$320

Dumas Automatic$239

Full specifications

Case

7 specs

Crystal & Dial

2 specs

Crystal

Mineral

Sapphire

Dial Color

—

Blue

Movement

2 specs

Caliber

—

Seiko NH35

Type

Quartz

Automatic

Pricing

1 specs

MSRP

$320

$239

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Rockwell Time 40mm2 (2nd Gen)vsSpinnaker Dumas Automatic

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