Which is cheaper, the Tornek-Rayville CISO M38 MAC V SOG or the Seiko Prospex SPEEDTIMER Mechanical?

At MSRP the Tornek-Rayville CISO M38 MAC V SOG is the cheaper of the two at $745, against $995 for the Seiko Prospex SPEEDTIMER Mechanical — a $250 gap before any retailer discounting.

Which is bigger, the Tornek-Rayville CISO M38 MAC V SOG or the Seiko Prospex SPEEDTIMER Mechanical?

The Seiko Prospex SPEEDTIMER Mechanical wears larger at 39.5mm versus 38mm for the Tornek-Rayville CISO M38 MAC V SOG — a 1.5mm difference across the dial.

Which has better water resistance, the Tornek-Rayville CISO M38 MAC V SOG or the Seiko Prospex SPEEDTIMER Mechanical?

The Tornek-Rayville CISO M38 MAC V SOG is rated to 100m versus 20m for the Seiko Prospex SPEEDTIMER Mechanical.

Which has a longer power reserve, the Tornek-Rayville CISO M38 MAC V SOG or the Seiko Prospex SPEEDTIMER Mechanical?

The Seiko Prospex SPEEDTIMER Mechanical 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 SPEEDTIMER Mechanical?

Both watches run automatic movements — the Tornek-Rayville CISO M38 MAC V SOG uses the TMI NH36 and the Seiko Prospex SPEEDTIMER Mechanical uses the 6R55.

Side by side

Tornek-Rayville CISO M38 MAC V SOGvsSeiko Prospex SPEEDTIMER Mechanical

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 SPEEDTIMER Mechanical

spb513j1

MSRP $995

At a glance

12 of 29 specs differ

Diameter

CISO M38 MAC V SOG38mm

Prospex SPEEDTIMER Mechanical39.5mm

Power Reserve

CISO M38 MAC V SOG42h

Prospex SPEEDTIMER Mechanical72h

Water Resistance

CISO M38 MAC V SOG100m

Prospex SPEEDTIMER Mechanical200m

MSRP

CISO M38 MAC V SOG$745

Prospex SPEEDTIMER Mechanical$995

Full specifications

Case

5 specs

Crystal & Dial

3 specs

Crystal Shape

Flat

Curved

AR Coating

Yes

Anti-reflective coating on inner surface

Lume

Superluminova

LumiBrite on hands and index(es)

Movement

3 specs

Caliber

TMI NH36

6R55

Power Reserve

42h

72h

Jewels

Pricing

1 specs

MSRP

$745

$995

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