Side by side

Echo/Neutra 1956 3HvsSeiko Prospex Sea 1970 Heritage Diver's Black Series Limited Edition

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

1956 3H
Echo/Neutra1956 3H
MSRP $1,025

At a glance

15 of 29 specs differ
Diameter
1956 3H40mm
Prospex Sea 1970 Heritage Diver's Black Series Limited Edition44mm
Power Reserve
1956 3H41h
Prospex Sea 1970 Heritage Diver's Black Series Limited Edition50h
Water Resistance
1956 3H100m
Prospex Sea 1970 Heritage Diver's Black Series Limited Edition200m
MSRP
1956 3H$1,025
Prospex Sea 1970 Heritage Diver's Black Series Limited Edition$3,300

Full specifications

Case

8 specs
Category
Diver
Diameter
40mm
44mm
Thickness
11.9mm
13mm
Lug-to-Lug
46mm
49.3mm
Material
316L Stainless Steel
Stainless Steel
Finish
Brushed + Polished
Brushed and polished
Water Resistance
100m
200m
Caseback
Solid screw-down
Solid

Crystal & Dial

3 specs
Crystal Shape
Ultra-domed
Curved
AR Coating
Underside
Anti-reflective coating on inner surface
Lume
Superluminova Old Radium
LumiBrite on hands, index(es) and bezel

Movement

3 specs
Caliber
Sellita SW200-1 elaboré
8L35
Power Reserve
41h
50h
Complications
GMT, Moonphase, Date
None

Pricing

1 specs
MSRP
$1,025
$3,300

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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.

Echo/Neutra 1956 3H

Owners widely praise the Echo/Neutra 1956 3H for its exceptionally well-executed bracelet, with one owner comparing it favorably to Rolex Oyster bracelets and noting the gray dial exceeded build quality expectations. The watch features a dramatic box-domed sapphire crystal and a unique blend of vintage tool-watch and mid-century design elements. However, reviewers flag legibility challenges in low light due to its fixed, lumed bezel and non-lumed dial, and some may find the branding polarizing. Overall, owners rate the Echo/Neutra 1956 3H highly for its unique character and comfortable wearability, particularly appreciating the bracelet's quality.

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.

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