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Seiko Prospex Marinemaster Marinemaster 1968 Heritage Diver's WatchvsSheffield 1A 40mm

Q: Which is cheaper, the Seiko Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch or the Sheffield 1A 40mm?

At MSRP the Sheffield 1A 40mm is the cheaper of the two at $228, against $3,600 for the Seiko Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch — a $3,372 gap before any retailer discounting.

Q: Which is bigger, the Seiko Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch or the Sheffield 1A 40mm?

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

Q: Which has better water resistance, the Seiko Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch or the Sheffield 1A 40mm?

The Seiko Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch is rated to 300m versus 200m for the Sheffield 1A 40mm.

Q: Which has a longer power reserve, the Seiko Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch or the Sheffield 1A 40mm?

The Seiko Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch carries a 72-hour power reserve against 40 hours on the Sheffield 1A 40mm.

Q: What movement does the Seiko Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch run compared to the Sheffield 1A 40mm?

Both watches run automatic movements — the Seiko Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch uses the 8L45 and the Sheffield 1A 40mm uses the Seiko NH35.

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

Add a watch

Seiko Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch

hbf001j1

MSRP $3,600

Sheffield 1A 40mm

allsport-1-auto

MSRP $228

At a glance

13 of 29 specs differ

Diameter

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

1A 40mm40mm

Power Reserve

Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch72h

1A 40mm40h

Water Resistance

Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch300m

1A 40mm200m

MSRP

Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch$3,600

1A 40mm$228

Full specifications

Case

5 specs

Crystal & Dial

4 specs

Crystal Shape

Curved

Flat

AR Coating

Anti-reflective coating on inner surface

Inner

Dial Color

Black

—

Lume

LumiBrite on hands, index(es) and bezel

None

Movement

3 specs

Caliber

8L45

Seiko NH35

Power Reserve

72h

40h

Jewels

Pricing

1 specs

MSRP

$3,600

$228

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Seiko Prospex Marinemaster Marinemaster 1968 Heritage Diver's WatchvsSheffield 1A 40mm

At a glance

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