Which is cheaper, the Bremont Supermarine 300M or the Impossible Watch Company IMP Time-Only?

At MSRP the Impossible Watch Company IMP Time-Only is the cheaper of the two at $495, against $3,550 for the Bremont Supermarine 300M — a $3,055 gap before any retailer discounting.

Which is bigger, the Bremont Supermarine 300M or the Impossible Watch Company IMP Time-Only?

The Bremont Supermarine 300M wears larger at 40mm versus 38.5mm for the Impossible Watch Company IMP Time-Only — a 1.5mm difference across the dial.

Which has better water resistance, the Bremont Supermarine 300M or the Impossible Watch Company IMP Time-Only?

The Bremont Supermarine 300M is rated to 300m versus 50m for the Impossible Watch Company IMP Time-Only.

Which has a longer power reserve, the Bremont Supermarine 300M or the Impossible Watch Company IMP Time-Only?

The Impossible Watch Company IMP Time-Only carries a 42-hour power reserve against 40 hours on the Bremont Supermarine 300M.

What movement does the Bremont Supermarine 300M run compared to the Impossible Watch Company IMP Time-Only?

Both watches run automatic movements — the Bremont Supermarine 300M uses the BE-92AE and the Impossible Watch Company IMP Time-Only uses the Miyota 82S0.

Side by side

Bremont Supermarine 300MvsImpossible Watch Company IMP Time-Only

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

Add a watch

Bremont Supermarine 300M

sm40-nd-ss-gn-b

MSRP $3,550

Impossible Watch Company IMP Time-Only

MSRP $495

Buy from Bremont ↗

Buy used on eBay ↗

Buy from Impossible Watch Company ↗

Buy used on eBay ↗

At a glance

10 of 29 specs differ

Diameter

Supermarine 300M40mm

IMP Time-Only38.5mm

Power Reserve

Supermarine 300M40h

IMP Time-Only42h

Water Resistance

Supermarine 300M300m

IMP Time-Only50m

MSRP

Supermarine 300M$3,550

IMP Time-Only$495

Full specifications

Case

5 specs

Crystal & Dial

2 specs

Crystal

Sapphire

Dial Color

Green

Salmon

Movement

2 specs

Caliber

BE-92AE

Miyota 82S0

Power Reserve

40h

42h

Pricing

1 specs

MSRP

$3,550

$495

Keep exploring

More watches worth a look

Matched to the watches above on size, movement, style and price — microbrands first. Open any one to dig in.

Spinnakermicro

Follow this matchup

Get a note when Bremont Supermarine 300M vs Impossible Watch Company IMP Time-Only gets more votes, a community discussion, or a price drop. No account needed.

Adjacent matchups

People also compared

Comparisons nearby in the catalog — alternatives to the watches above paired against the matchup.

Impossible Watch Company IMP Time-OnlyvsSpinnaker Spence 300 Impossible Watch Company IMP Time-OnlyvsGalo Super200 Dark Edition Impossible Watch Company IMP Time-OnlyvsGalo Super200 Impossible Watch Company IMP Time-OnlyvsPhoibos Eagle Ray No Date Asterisk Watches Charley Harper TurtleneckvsBremont Supermarine 300M Bremont Supermarine 300MvsImpossible Watch Company IMP Chronograph

Edit this comparison Add another watch Explore more 37–41mm watches

Bremont Supermarine 300MvsImpossible Watch Company IMP Time-Only

At a glance

Full specifications

More watches worth a look

Spence 300

Charley Harper Turtleneck

Super200 Dark Edition

DEVI - A Tribute to Divine Strength

Meca Revolt

Eagle Ray No Date

D5 Tropic Auto

Sea Serpent Bronze & Navy

Follow this matchup

People also compared