Which is cheaper, the Gruppo Gamma Vanguard Steel Date or the Seiko Prospex Marinemaster Marinemaster 1965 Heritage Diver's Watch?

At MSRP the Gruppo Gamma Vanguard Steel Date is the cheaper of the two at $790, against $2,800 for the Seiko Prospex Marinemaster Marinemaster 1965 Heritage Diver's Watch — a $2,010 gap before any retailer discounting.

Which is bigger, the Gruppo Gamma Vanguard Steel Date or the Seiko Prospex Marinemaster Marinemaster 1965 Heritage Diver's Watch?

The Gruppo Gamma Vanguard Steel Date wears larger at 42mm versus 39.5mm for the Seiko Prospex Marinemaster Marinemaster 1965 Heritage Diver's Watch — a 2.5mm difference across the dial.

Which has better water resistance, the Gruppo Gamma Vanguard Steel Date or the Seiko Prospex Marinemaster Marinemaster 1965 Heritage Diver's Watch?

The Seiko Prospex Marinemaster Marinemaster 1965 Heritage Diver's Watch is rated to 200m versus 100m for the Gruppo Gamma Vanguard Steel Date.

Which has a longer power reserve, the Gruppo Gamma Vanguard Steel Date or the Seiko Prospex Marinemaster Marinemaster 1965 Heritage Diver's Watch?

The Seiko Prospex Marinemaster Marinemaster 1965 Heritage Diver's Watch carries a 45-hour power reserve against 42 hours on the Gruppo Gamma Vanguard Steel Date.

What movement does the Gruppo Gamma Vanguard Steel Date run compared to the Seiko Prospex Marinemaster Marinemaster 1965 Heritage Diver's Watch?

Both watches run automatic movements — the Gruppo Gamma Vanguard Steel Date uses the Miyota 9015 and the Seiko Prospex Marinemaster Marinemaster 1965 Heritage Diver's Watch uses the 6L37.

Side by side

Gruppo Gamma Vanguard Steel DatevsSeiko Prospex Marinemaster Marinemaster 1965 Heritage Diver's Watch

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

Gruppo Gamma Vanguard Steel Date

ag-11

MSRP $790

Seiko Prospex Marinemaster Marinemaster 1965 Heritage Diver's Watch

sje117j1

MSRP $2,800

At a glance

15 of 29 specs differ

Diameter

Vanguard Steel Date42mm

Prospex Marinemaster Marinemaster 1965 Heritage Diver's Watch39.5mm

Power Reserve

Vanguard Steel Date42h

Prospex Marinemaster Marinemaster 1965 Heritage Diver's Watch45h

Water Resistance

Vanguard Steel Date100m

Prospex Marinemaster Marinemaster 1965 Heritage Diver's Watch200m

MSRP

Vanguard Steel Date$790

Prospex Marinemaster Marinemaster 1965 Heritage Diver's Watch$2,800

Full specifications

Case

6 specs

Crystal & Dial

4 specs

Crystal Shape

Flat

Box

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

6L37

Power Reserve

42h

45h

Jewels

Complications

Date

None

Pricing

1 specs

MSRP

$790

$2,800

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