Side by side

Tornek-Rayville CISO M38 FieldvsSeiko Prospex Sea The Black Series

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

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 The Black Series

The Seiko Prospex Sea The Black Series is widely praised for its impressive value and compelling design elements. Reviewers highlight the SLA073's cave-diving-inspired dial, high-quality bracelet, and the robust 8L35 movement, calling it a standout release. The SRPE33 and SRPE39 models are noted for their attractive price, manta ray decorated dials, and excellent LumiBrite lume, though bezel alignment can be inconsistent. The SNJ029 is celebrated for its dynamic, colorful aesthetic, solar charging, and comfortable strap, making it ideal for outdoor adventures. Overall, the consensus is that Seiko Prospex Sea The Black Series models offer excellent value, with specific models lauded for their unique dials, quality finishing, and practical features like solar charging.

At a glance

12 of 29 specs differ
Diameter
CISO M38 Field38mm
Prospex Sea The Black Series45mm
Power Reserve
CISO M38 Field42h
Prospex Sea The Black Series41h
Water Resistance
CISO M38 Field100m
Prospex Sea The Black Series200m
MSRP
CISO M38 Field$695
Prospex Sea The Black Series$765

Full specifications

Case

6 specs
Category
Diver
Diameter
38mm
45mm
Thickness
12.45mm
13.2mm
Lug-to-Lug
43.6mm
47.7mm
Lug Width
20mm
22mm
Water Resistance
100m
200m

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
Seiko 4R36
Power Reserve
42h
41h
Jewels
25
24

Pricing

1 specs
MSRP
$695
$765
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