What movement does the Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition run compared to the Helgray Speedster (Racing Light Blue)?

Both watches run automatic movements — the Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition uses the 6R35 and the Helgray Speedster (Racing Light Blue) uses the Miyota 6S21.

Side by side

Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special EditionvsHelgray Speedster (Racing Light Blue)

Q: Which is cheaper, the Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition or the Helgray Speedster (Racing Light Blue)?

At MSRP the Helgray Speedster (Racing Light Blue) is the cheaper of the two at $299, against $1,350 for the Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition — a $1,051 gap before any retailer discounting.

Q: Which is bigger, the Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition or the Helgray Speedster (Racing Light Blue)?

The Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition wears larger at 42.7mm versus 39mm for the Helgray Speedster (Racing Light Blue) — a 3.7mm difference across the dial.

Q: Which has better water resistance, the Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition or the Helgray Speedster (Racing Light Blue)?

The Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition is rated to 200m versus 30m for the Helgray Speedster (Racing Light Blue).

Q: Which has a longer power reserve, the Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition or the Helgray Speedster (Racing Light Blue)?

The Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition carries a 70-hour power reserve against 40 hours on the Helgray Speedster (Racing Light Blue).

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

Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition

spb301j1

MSRP $1,350

Helgray Speedster (Racing Light Blue)

speedster-racing-light-blue

MSRP $299

At a glance

12 of 29 specs differ

Diameter

Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition42.7mm

Speedster (Racing Light Blue)39mm

Power Reserve

Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition70h

Speedster (Racing Light Blue)40h

Water Resistance

Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition200m

Speedster (Racing Light Blue)30m

MSRP

Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition$1,350

Speedster (Racing Light Blue)$299

Full specifications

Case

5 specs

Crystal & Dial

3 specs

Crystal Shape

Curved

Flat

AR Coating

Anti-reflective coating on inner surface

Inner

Lume

LumiBrite on hands, index(es) and bezel

None

Movement

3 specs

Caliber

6R35

Miyota 6S21

Power Reserve

70h

40h

Jewels

Pricing

1 specs

MSRP

$1,350

$299

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