Which is cheaper, the Gruppo Gamma Vanguard Steel Date or the Bremont Supermarine 300M?

At MSRP the Gruppo Gamma Vanguard Steel Date is the cheaper of the two at $790, against $3,550 for the Bremont Supermarine 300M — a $2,760 gap before any retailer discounting.

Which is bigger, the Gruppo Gamma Vanguard Steel Date or the Bremont Supermarine 300M?

The Gruppo Gamma Vanguard Steel Date wears larger at 42mm versus 40mm for the Bremont Supermarine 300M — a 2mm difference across the dial.

Which has better water resistance, the Gruppo Gamma Vanguard Steel Date or the Bremont Supermarine 300M?

The Bremont Supermarine 300M is rated to 300m versus 100m for the Gruppo Gamma Vanguard Steel Date.

Which has a longer power reserve, the Gruppo Gamma Vanguard Steel Date or the Bremont Supermarine 300M?

The Gruppo Gamma Vanguard Steel Date carries a 42-hour power reserve against 40 hours on the Bremont Supermarine 300M.

What movement does the Gruppo Gamma Vanguard Steel Date run compared to the Bremont Supermarine 300M?

Both watches run automatic movements — the Gruppo Gamma Vanguard Steel Date uses the Miyota 9015 and the Bremont Supermarine 300M uses the BE-92AE.

Side by side

Gruppo Gamma Vanguard Steel DatevsBremont Supermarine 300M

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

Bremont Supermarine 300M

sm40-nd-ss-gn-b

MSRP $3,550

At a glance

14 of 29 specs differ

Diameter

Vanguard Steel Date42mm

Supermarine 300M40mm

Power Reserve

Vanguard Steel Date42h

Supermarine 300M40h

Water Resistance

Vanguard Steel Date100m

Supermarine 300M300m

MSRP

Vanguard Steel Date$790

Supermarine 300M$3,550

Full specifications

Case

7 specs

Crystal & Dial

3 specs

AR Coating

Yes

Inner

Dial Color

Forged Carbon

Green

Lume

Super-LumiNova

None

Movement

3 specs

Caliber

Miyota 9015

BE-92AE

Power Reserve

42h

40h

Complications

Date

None

Pricing

1 specs

MSRP

$790

$3,550

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