Which is cheaper, the Seiko Prospex Sea 1968 Heritage Diver's GMT or the Spinnaker Piccard Skeleton?

At MSRP the Spinnaker Piccard Skeleton 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 Seiko Prospex Sea 1968 Heritage Diver's GMT or the Spinnaker Piccard Skeleton?

The Spinnaker Piccard Skeleton wears larger at 45mm versus 42mm for the Seiko Prospex Sea 1968 Heritage Diver's GMT — a 3mm difference across the dial.

Which has better water resistance, the Seiko Prospex Sea 1968 Heritage Diver's GMT or the Spinnaker Piccard Skeleton?

The Spinnaker Piccard Skeleton is rated to 550m versus 200m for the Seiko Prospex Sea 1968 Heritage Diver's GMT.

Which has a longer power reserve, the Seiko Prospex Sea 1968 Heritage Diver's GMT or the Spinnaker Piccard Skeleton?

The Seiko Prospex Sea 1968 Heritage Diver's GMT carries a 72-hour power reserve against 40 hours on the Spinnaker Piccard Skeleton.

What movement does the Seiko Prospex Sea 1968 Heritage Diver's GMT run compared to the Spinnaker Piccard Skeleton?

Both watches run automatic movements — the Seiko Prospex Sea 1968 Heritage Diver's GMT uses the 6R54 and the Spinnaker Piccard Skeleton uses the SII NH38A.

Side by side

Seiko Prospex Sea 1968 Heritage Diver's GMTvsSpinnaker Piccard Skeleton

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

Seiko Prospex Sea 1968 Heritage Diver's GMT

spb381j1

MSRP $1,500

Spinnaker Piccard Skeleton

piccard-skeleton-automatic-dust-black-sp-5135-11

MSRP $550

At a glance

12 of 29 specs differ

Diameter

Prospex Sea 1968 Heritage Diver's GMT42mm

Piccard Skeleton45mm

Power Reserve

Prospex Sea 1968 Heritage Diver's GMT72h

Piccard Skeleton40h

Water Resistance

Prospex Sea 1968 Heritage Diver's GMT200m

Piccard Skeleton550m

MSRP

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

Piccard Skeleton$550

Full specifications

Case

6 specs

Diameter

42mm

45mm

Thickness

12.9mm

21mm

Lug-to-Lug

48.6mm

52mm

Lug Width

20mm

22mm

Material

Stainless Steel

316L Stainless Steel

Water Resistance

200m

550m

Crystal & Dial

2 specs

AR Coating

Anti-reflective coating on inner surface

Inner

Lume

LumiBrite on hands, index(es) and bezel

None

Movement

3 specs

Caliber

6R54

SII NH38A

Power Reserve

72h

40h

Jewels

Pricing

1 specs

MSRP

$1,500

$550

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