Side by side

Tornek-Rayville CISO M38 FieldvsSeiko Prospex Sea 1968 Heritage Diver's GMT Watch

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

At a glance

11 of 29 specs differ
Diameter
CISO M38 Field38mm
Prospex Sea 1968 Heritage Diver's GMT Watch42mm
Power Reserve
CISO M38 Field42h
Prospex Sea 1968 Heritage Diver's GMT Watch72h
Water Resistance
CISO M38 Field100m
Prospex Sea 1968 Heritage Diver's GMT Watch300m
MSRP
CISO M38 Field$695
Prospex Sea 1968 Heritage Diver's GMT Watch$1,700

Full specifications

Case

5 specs
Category
Diver
Diameter
38mm
42mm
Thickness
12.45mm
13.3mm
Lug-to-Lug
43.6mm
48.6mm
Water Resistance
100m
300m

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
25
24

Pricing

1 specs
MSRP
$695
$1,700

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What people say

Owners + reviewers, side by side

Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.

Tornek-Rayville CISO M38 Field

Owners widely report the Tornek-Rayville CISO M38 Field offers high overall quality with a comfortable bracelet featuring single-sided screw links. The watch exhibits minimal wear, with only hairline scratches and a faint, difficult-to-photograph bezel mark. On balance, owners value the Tornek-Rayville CISO M38 Field for its robust build and comfortable wearability.

Seiko Prospex Sea 1968 Heritage Diver's GMT Watch

The Seiko Prospex Sea 1968 Heritage Diver's GMT Watch offers a 300-meter depth rating and a caller-style GMT complication powered by the Caliber 6R54 movement, which provides a 72-hour power reserve. Reviewers note its refined clasp with extensive micro-adjustment. However, the movement's accuracy, ranging from +25 to -15 seconds per day, is considered a drawback by some. Overall, reviewers highlight the Seiko Prospex Sea 1968 Heritage Diver's GMT Watch as a good reminder of Seiko's value, despite the wide accuracy range of its movement.

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