Which is cheaper, the Lum-Tec B68 Day Date or the Seiko Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch?

At MSRP the Lum-Tec B68 Day Date is the cheaper of the two at $595, against $3,600 for the Seiko Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch — a $3,005 gap before any retailer discounting.

Which is bigger, the Lum-Tec B68 Day Date or the Seiko Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch?

The Lum-Tec B68 Day Date wears larger at 44mm versus 42.6mm for the Seiko Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch — a 1.4mm difference across the dial.

Which has better water resistance, the Lum-Tec B68 Day Date 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 Lum-Tec B68 Day Date.

Which has a longer power reserve, the Lum-Tec B68 Day Date or the Seiko Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch?

The Seiko Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch carries a 72-hour power reserve against 40 hours on the Lum-Tec B68 Day Date.

What movement does the Lum-Tec B68 Day Date run compared to the Seiko Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch?

The Lum-Tec B68 Day Date runs a quartz caliber (Ronda 515), while the Seiko Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch runs a automatic (8L45).

Side by side

Lum-Tec B68 Day DatevsSeiko Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch

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

Lum-Tec B68 Day Date

combat-b68

MSRP $595

Seiko Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch

hbf001j1

MSRP $3,600

At a glance

17 of 29 specs differ

Diameter

B68 Day Date44mm

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

Power Reserve

B68 Day Date40h

Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch72h

Water Resistance

B68 Day Date200m

Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch300m

MSRP

B68 Day Date$595

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

Full specifications

Case

7 specs

Crystal & Dial

5 specs

Crystal

Domed Sapphire

Sapphire

Crystal Shape

Flat

Curved

AR Coating

Inner

Anti-reflective coating on inner surface

Dial Color

B68 Day Date

Black

Lume

None

LumiBrite on hands, index(es) and bezel

Movement

4 specs

Caliber

Ronda 515

8L45

Type

Quartz

Automatic

Power Reserve

40h

72h

Jewels

Pricing

1 specs

MSRP

$595

$3,600

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