Which is cheaper, the Sheffield 1A SCR II Blue or the Seiko Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch?

At MSRP the Sheffield 1A SCR II Blue is the cheaper of the two at $278, against $2,900 for the Seiko Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch — a $2,622 gap before any retailer discounting.

Which is bigger, the Sheffield 1A SCR II Blue or the Seiko Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch?

The Seiko Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch wears larger at 42.6mm versus 40mm for the Sheffield 1A SCR II Blue — a 2.6mm difference across the dial.

Which has better water resistance, the Sheffield 1A SCR II Blue or the Seiko Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch?

The Seiko Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch is rated to 300m versus 200m for the Sheffield 1A SCR II Blue.

Which has a longer power reserve, the Sheffield 1A SCR II Blue or the Seiko Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch?

The Seiko Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch carries a 50-hour power reserve against 40 hours on the Sheffield 1A SCR II Blue.

What movement does the Sheffield 1A SCR II Blue run compared to the Seiko Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch?

Both watches run automatic movements — the Sheffield 1A SCR II Blue uses the Seiko NH35 and the Seiko Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch uses the 8L35.

Side by side

Sheffield 1A SCR II BluevsSeiko Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch

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

Add a watch

Sheffield 1A SCR II Blue

1a-scr-ii-blue

MSRP $278

Seiko Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch

sla077j1

MSRP $2,900

At a glance

13 of 29 specs differ

Diameter

1A SCR II Blue40mm

Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch42.6mm

Power Reserve

1A SCR II Blue40h

Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch50h

Water Resistance

1A SCR II Blue200m

Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch300m

MSRP

1A SCR II Blue$278

Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch$2,900

Full specifications

Case

5 specs

Crystal & Dial

4 specs

Crystal Shape

Flat

Curved

AR Coating

Inner

Anti-reflective coating on inner surface

Dial Color

Blue

Black

Lume

None

LumiBrite on hands, index(es) and bezel

Movement

3 specs

Caliber

Seiko NH35

8L35

Power Reserve

40h

50h

Jewels

Pricing

1 specs

MSRP

—

$2,900

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Sheffield 1A SCR II BluevsSeiko Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch

At a glance

Full specifications

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