Side by side

Citizen Series 8 870vsSeiko Prospex Sea 1968 Heritage Diver's GMT Watch

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

Series 8 870
CitizenSeries 8 870
MSRP $1,095

At a glance

13 of 29 specs differ
Diameter
Series 8 87039mm
Prospex Sea 1968 Heritage Diver's GMT Watch42mm
Power Reserve
Series 8 87042h
Prospex Sea 1968 Heritage Diver's GMT Watch72h
Water Resistance
Series 8 870100m
Prospex Sea 1968 Heritage Diver's GMT Watch300m
MSRP
Series 8 870$1,095
Prospex Sea 1968 Heritage Diver's GMT Watch$1,700

Full specifications

Case

6 specs
Category
Sport
Diver
Diameter
39mm
42mm
Thickness
12mm
13.3mm
Lug-to-Lug
46mm
48.6mm
Lug Width
11mm
20mm
Water Resistance
100m
300m

Crystal & Dial

3 specs
AR Coating
Underside
Anti-reflective coating on inner surface
Dial Color
Green
Black
Lume
None
LumiBrite on hands, index(es) and bezel

Movement

3 specs
Caliber
9051
6R54
Power Reserve
42h
72h
Jewels
25
24

Pricing

1 specs
MSRP
$1,095
$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.

Citizen Series 8 870

The Citizen Series 8 870 is praised for its compelling value proposition and modern Japanese design with a sporty edge. Reviewers note its 40mm steel case, glossy dial with applied markers, and the in-house Calibre 0950 automatic movement offering 50 hours of power reserve and enhanced magnetic resistance. The flat sapphire crystal is noted to collect fingerprints, and the solid caseback omits a view of the movement. The limited edition variant features a 40.8mm black DLC-coated case, a carbon fiber dial, and the 0950 movement regulated to -5/+10 seconds per day. Overall, the Citizen Series 8 870 is viewed as a strong offering for its blend of design and features.

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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