Which is cheaper, the Hemel HFC Mechanical Chronograph or the Seiko Prospex Sea 1968 Heritage Diver's GMT?

At MSRP the Hemel HFC Mechanical Chronograph is the cheaper of the two at $550, against $1,500 for the Seiko Prospex Sea 1968 Heritage Diver's GMT — a $950 gap before any retailer discounting.

Which is bigger, the Hemel HFC Mechanical Chronograph or the Seiko Prospex Sea 1968 Heritage Diver's GMT?

The Seiko Prospex Sea 1968 Heritage Diver's GMT wears larger at 42mm versus 40mm for the Hemel HFC Mechanical Chronograph — a 2mm difference across the dial.

Which has better water resistance, the Hemel HFC Mechanical Chronograph or the Seiko Prospex Sea 1968 Heritage Diver's GMT?

The Seiko Prospex Sea 1968 Heritage Diver's GMT is rated to 200m versus 100m for the Hemel HFC Mechanical Chronograph.

Which has a longer power reserve, the Hemel HFC Mechanical Chronograph or the Seiko Prospex Sea 1968 Heritage Diver's GMT?

The Seiko Prospex Sea 1968 Heritage Diver's GMT carries a 72-hour power reserve against 40 hours on the Hemel HFC Mechanical Chronograph.

What movement does the Hemel HFC Mechanical Chronograph run compared to the Seiko Prospex Sea 1968 Heritage Diver's GMT?

The Hemel HFC Mechanical Chronograph runs a manual caliber (Seagull ST19), while the Seiko Prospex Sea 1968 Heritage Diver's GMT runs a automatic (6R54).

Side by side

Hemel HFC Mechanical ChronographvsSeiko Prospex Sea 1968 Heritage Diver's GMT

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

Hemel HFC Mechanical Chronograph

the-airfoil

MSRP $550

Seiko Prospex Sea 1968 Heritage Diver's GMT

spb381j1

MSRP $1,500

At a glance

15 of 29 specs differ

Diameter

HFC Mechanical Chronograph40mm

Prospex Sea 1968 Heritage Diver's GMT42mm

Power Reserve

HFC Mechanical Chronograph40h

Prospex Sea 1968 Heritage Diver's GMT72h

Water Resistance

HFC Mechanical Chronograph100m

Prospex Sea 1968 Heritage Diver's GMT200m

MSRP

HFC Mechanical Chronograph$550

Prospex Sea 1968 Heritage Diver's GMT$1,500

Full specifications

Case

6 specs

Crystal & Dial

4 specs

Crystal

Domed Sapphire

Sapphire

AR Coating

Inner

Anti-reflective coating on inner surface

Dial Color

Airfoil (1970s British Pilot)

Black

Lume

None

LumiBrite on hands, index(es) and bezel

Movement

4 specs

Caliber

Seagull ST19

6R54

Type

Manual

Automatic

Power Reserve

40h

72h

Jewels

Pricing

1 specs

MSRP

$550

$1,500

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