Which is cheaper, the Gruppo Gamma Vanguard Weathered Date or the Seiko Prospex Sea?

At MSRP the Gruppo Gamma Vanguard Weathered Date is the cheaper of the two at $790, against $1,100 for the Seiko Prospex Sea — a $310 gap before any retailer discounting.

Which is bigger, the Gruppo Gamma Vanguard Weathered Date or the Seiko Prospex Sea?

The Gruppo Gamma Vanguard Weathered Date wears larger at 42mm versus 41.3mm for the Seiko Prospex Sea — a 0.7mm difference across the dial.

Which has better water resistance, the Gruppo Gamma Vanguard Weathered Date or the Seiko Prospex Sea?

The Seiko Prospex Sea is rated to 300m versus 100m for the Gruppo Gamma Vanguard Weathered Date.

Which has a longer power reserve, the Gruppo Gamma Vanguard Weathered Date or the Seiko Prospex Sea?

The Seiko Prospex Sea carries a 72-hour power reserve against 42 hours on the Gruppo Gamma Vanguard Weathered Date.

What movement does the Gruppo Gamma Vanguard Weathered Date run compared to the Seiko Prospex Sea?

Both watches run automatic movements — the Gruppo Gamma Vanguard Weathered Date uses the Miyota 9015 and the Seiko Prospex Sea uses the 6R55.

Side by side

Gruppo Gamma Vanguard Weathered DatevsSeiko Prospex Sea

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

Gruppo Gamma Vanguard Weathered Date

av-11

MSRP $790

Seiko Prospex Sea

spb481j1

MSRP $1,100

At a glance

15 of 29 specs differ

Diameter

Vanguard Weathered Date42mm

Prospex Sea41.3mm

Power Reserve

Vanguard Weathered Date42h

Prospex Sea72h

Water Resistance

Vanguard Weathered Date100m

Prospex Sea300m

MSRP

Vanguard Weathered Date$790

Prospex Sea$1,100

Full specifications

Case

7 specs

Crystal & Dial

3 specs

AR Coating

Yes

Anti-reflective coating on inner surface

Dial Color

Forged Carbon

Black

Lume

Super-LumiNova

LumiBrite on hands, index(es) and bezel

Movement

4 specs

Caliber

Miyota 9015

6R55

Power Reserve

42h

72h

Jewels

Complications

Date

None

Pricing

1 specs

MSRP

$790

$1,100

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