Which is cheaper, the Tornek-Rayville CISO M38 MAC V SOG or the Seiko Prospex Sea 1968 Heritage Diver's GMT Watch?

At MSRP the Tornek-Rayville CISO M38 MAC V SOG is the cheaper of the two at $745, against $1,700 for the Seiko Prospex Sea 1968 Heritage Diver's GMT Watch — a $955 gap before any retailer discounting.

Which is bigger, the Tornek-Rayville CISO M38 MAC V SOG or the Seiko Prospex Sea 1968 Heritage Diver's GMT Watch?

The Seiko Prospex Sea 1968 Heritage Diver's GMT Watch wears larger at 42mm versus 38mm for the Tornek-Rayville CISO M38 MAC V SOG — a 4mm difference across the dial.

Which has better water resistance, the Tornek-Rayville CISO M38 MAC V SOG or the Seiko Prospex Sea 1968 Heritage Diver's GMT Watch?

The Seiko Prospex Sea 1968 Heritage Diver's GMT Watch is rated to 300m versus 100m for the Tornek-Rayville CISO M38 MAC V SOG.

Which has a longer power reserve, the Tornek-Rayville CISO M38 MAC V SOG or the Seiko Prospex Sea 1968 Heritage Diver's GMT Watch?

The Seiko Prospex Sea 1968 Heritage Diver's GMT Watch carries a 72-hour power reserve against 42 hours on the Tornek-Rayville CISO M38 MAC V SOG.

What movement does the Tornek-Rayville CISO M38 MAC V SOG run compared to the Seiko Prospex Sea 1968 Heritage Diver's GMT Watch?

Both watches run automatic movements — the Tornek-Rayville CISO M38 MAC V SOG uses the TMI NH36 and the Seiko Prospex Sea 1968 Heritage Diver's GMT Watch uses the 6R54.

Side by side

Tornek-Rayville CISO M38 MAC V SOGvsSeiko Prospex Sea 1968 Heritage Diver's GMT Watch

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

Tornek-Rayville CISO M38 MAC V SOG

ciso-m38-mac-v-sog

MSRP $745

Seiko Prospex Sea 1968 Heritage Diver's GMT Watch

spb519j1

MSRP $1,700

At a glance

11 of 29 specs differ

Diameter

CISO M38 MAC V SOG38mm

Prospex Sea 1968 Heritage Diver's GMT Watch42mm

Power Reserve

CISO M38 MAC V SOG42h

Prospex Sea 1968 Heritage Diver's GMT Watch72h

Water Resistance

CISO M38 MAC V SOG100m

Prospex Sea 1968 Heritage Diver's GMT Watch300m

MSRP

CISO M38 MAC V SOG$745

Prospex Sea 1968 Heritage Diver's GMT Watch$1,700

Full specifications

Case

5 specs

Crystal & Dial

2 specs

AR Coating

Yes

Anti-reflective coating on inner surface

Lume

Superluminova

LumiBrite on hands, index(es) and bezel

Movement

3 specs

Caliber

TMI NH36

6R54

Power Reserve

42h

72h

Jewels

Pricing

1 specs

MSRP

$745

$1,700

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