Side by side

Seiko Prospex Sea 1970 Heritage Diver's Black Series Limited EditionvsTudor Pelagos Ultra

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

Pelagos Ultra
TudorPelagos Ultra
MSRP $6,900

At a glance

20 of 29 specs differ
Diameter
Prospex Sea 1970 Heritage Diver's Black Series Limited Edition44mm
Pelagos Ultra40mm
Power Reserve
Prospex Sea 1970 Heritage Diver's Black Series Limited Edition50h
Pelagos Ultra65h
Water Resistance
Prospex Sea 1970 Heritage Diver's Black Series Limited Edition200m
Pelagos Ultra100m
MSRP
Prospex Sea 1970 Heritage Diver's Black Series Limited Edition$3,300
Pelagos Ultra$6,900

Full specifications

Case

8 specs
Diameter
44mm
40mm
Thickness
13mm
14.5mm
Lug-to-Lug
49.3mm
46mm
Lug Width
20mm
22mm
Material
Stainless Steel
Titanium
Finish
Brushed and polished
Satin
Water Resistance
200m
100m
Caseback
Solid
Solid screw-down

Crystal & Dial

5 specs
Crystal Shape
Curved
AR Coating
Anti-reflective coating on inner surface
Dial Color
Black
Indices
Applied
Lume
LumiBrite on hands, index(es) and bezel
None

Movement

6 specs
Caliber
8L35
MT5612-U
Beat Rate
28,800 vph
0 vph
Power Reserve
50h
65h
Jewels
26
0
Hacking
Yes
No
Hand-winding
Yes
No

Pricing

1 specs
MSRP
$3,300
$6,900

Follow this matchup

Get a note when Seiko Prospex Sea 1970 Heritage Diver's Black Series Limited Edition vs Tudor Pelagos Ultra gets more votes, a community discussion, or a price drop. No account needed.

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.

Tudor Pelagos Ultra

The Tudor Pelagos Ultra is praised for its 1000 meters of water resistance, METAS-certified Calibre MT5612-U movement, and fully lumed dial and bezel. Reviewers highlight its titanium case and self-adjusting clasp as key features. The Tudor Pelagos Ultra is slightly larger at 43mm than some other models in the line but wears comfortably. Overall, owners and reviewers rate the Tudor Pelagos Ultra highly for its technical specifications and comfortable wearability as a flagship dive watch.

From video reviewers

The Tudor Pelagos Ultra's all-titanium construction provides a lightweight and durable case. One weakness is the lack of lume brightness. Reviewers disagree on whether the helium release valve is a notable feature or a drawback for a more streamlined design.

Keep exploring

More watches worth a look

Matched to the watches above on size, movement, style and price — microbrands first. Open any one to dig in.

Adjacent matchups

People also compared

Comparisons nearby in the catalog — alternatives to the watches above paired against the matchup.