Which is cheaper, the Helgray Poseidon Diver (Automatic) or the Seiko Prospex Sea 1970 Heritage Diver's Black Series Limited Edition?

At MSRP the Helgray Poseidon Diver (Automatic) is the cheaper of the two at $249, against $3,300 for the Seiko Prospex Sea 1970 Heritage Diver's Black Series Limited Edition — a $3,051 gap before any retailer discounting.

Which is bigger, the Helgray Poseidon Diver (Automatic) or the Seiko Prospex Sea 1970 Heritage Diver's Black Series Limited Edition?

The Seiko Prospex Sea 1970 Heritage Diver's Black Series Limited Edition wears larger at 44mm versus 40mm for the Helgray Poseidon Diver (Automatic) — a 4mm difference across the dial.

Which has better water resistance, the Helgray Poseidon Diver (Automatic) or the Seiko Prospex Sea 1970 Heritage Diver's Black Series Limited Edition?

The Helgray Poseidon Diver (Automatic) is rated to 300m versus 200m for the Seiko Prospex Sea 1970 Heritage Diver's Black Series Limited Edition.

Which has a longer power reserve, the Helgray Poseidon Diver (Automatic) or the Seiko Prospex Sea 1970 Heritage Diver's Black Series Limited Edition?

The Seiko Prospex Sea 1970 Heritage Diver's Black Series Limited Edition carries a 50-hour power reserve against 40 hours on the Helgray Poseidon Diver (Automatic).

What movement does the Helgray Poseidon Diver (Automatic) run compared to the Seiko Prospex Sea 1970 Heritage Diver's Black Series Limited Edition?

Both watches run automatic movements — the Helgray Poseidon Diver (Automatic) uses the NH35 Warranty and the Seiko Prospex Sea 1970 Heritage Diver's Black Series Limited Edition uses the 8L35.

Side by side

Helgray Poseidon Diver (Automatic)vsSeiko Prospex Sea 1970 Heritage Diver's Black Series Limited Edition

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

Helgray Poseidon Diver (Automatic)

poseidon-diver-automatic

MSRP $249

Seiko Prospex Sea 1970 Heritage Diver's Black Series Limited Edition

sla061j1

MSRP $3,300

At a glance

11 of 29 specs differ

Diameter

Poseidon Diver (Automatic)40mm

Prospex Sea 1970 Heritage Diver's Black Series Limited Edition44mm

Power Reserve

Poseidon Diver (Automatic)40h

Prospex Sea 1970 Heritage Diver's Black Series Limited Edition50h

Water Resistance

Poseidon Diver (Automatic)300m

Prospex Sea 1970 Heritage Diver's Black Series Limited Edition200m

MSRP

Poseidon Diver (Automatic)$249

Prospex Sea 1970 Heritage Diver's Black Series Limited Edition$3,300

Full specifications

Case

4 specs

Diameter

40mm

44mm

Thickness

12mm

13mm

Lug-to-Lug

46mm

49.3mm

Water Resistance

300m

200m

Crystal & Dial

3 specs

Crystal Shape

Flat

Curved

AR Coating

Inner

Anti-reflective coating on inner surface

Lume

None

LumiBrite on hands, index(es) and bezel

Movement

3 specs

Caliber

NH35 Warranty

8L35

Power Reserve

40h

50h

Jewels

Pricing

1 specs

MSRP

$249

$3,300

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