Side by side

Seiko Prospex Sea 1970 Heritage Diver's Black Series Limited EditionvsTornek-Rayville CISO M38 Field

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

At a glance

12 of 29 specs differ
Diameter
Prospex Sea 1970 Heritage Diver's Black Series Limited Edition44mm
CISO M38 Field38mm
Power Reserve
Prospex Sea 1970 Heritage Diver's Black Series Limited Edition50h
CISO M38 Field42h
Water Resistance
Prospex Sea 1970 Heritage Diver's Black Series Limited Edition200m
CISO M38 Field100m
MSRP
Prospex Sea 1970 Heritage Diver's Black Series Limited Edition$3,300
CISO M38 Field$695

Full specifications

Case

5 specs
Category
Diver
Diameter
44mm
38mm
Thickness
13mm
12.45mm
Lug-to-Lug
49.3mm
43.6mm
Water Resistance
200m
100m

Crystal & Dial

3 specs
Crystal Shape
Curved
Flat
AR Coating
Anti-reflective coating on inner surface
Yes
Lume
LumiBrite on hands, index(es) and bezel
Superluminova

Movement

3 specs
Caliber
8L35
TMI NH36
Power Reserve
50h
42h
Jewels
26
25

Pricing

1 specs
MSRP
$3,300
$695

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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.

Seiko Prospex Sea 1970 Heritage Diver's Black Series Limited Edition

Owners widely praise the Seiko Prospex Sea 1970 Heritage Diver's Black Series Limited Edition for its attractive, well-made design and gorgeous dial, noting its jewel-toned teal color and rippling-water pattern. The bezel action is smooth with a muted sound, and the case and bracelet offer a more comfortable feel than previous iterations. However, multiple owners express disappointment with the accuracy of the 6R movement at its price point, with some noting theirs runs slow, and consider the price too high. The steep rehaut and marker size make the 24-hour numbers difficult to read, and some find the case design makes the watch feel top-heavy despite wearing smaller. Overall, owners rate the Seiko Prospex Sea 1970 Heritage Diver's Black Series Limited Edition highly for its striking dial and refined case design, despite concerns regarding movement accuracy at its price.

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.

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