Side by side

Seiko Prospex Sea 1968 Heritage Diver's GMTvsLongines SPIRIT ZULU TIME

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

Prospex Sea 1968 Heritage Diver's GMT
SeikoProspex Sea 1968 Heritage Diver's GMT
MSRP $1,500
SPIRIT ZULU TIME
LonginesSPIRIT ZULU TIME
MSRP $3,550

At a glance

21 of 29 specs differ
Diameter
Prospex Sea 1968 Heritage Diver's GMT42mm
SPIRIT ZULU TIME39mm
Power Reserve
Prospex Sea 1968 Heritage Diver's GMT72h
SPIRIT ZULU TIME72h
Water Resistance
Prospex Sea 1968 Heritage Diver's GMT200m
SPIRIT ZULU TIME100m
MSRP
Prospex Sea 1968 Heritage Diver's GMT$1,500
SPIRIT ZULU TIME$3,550

Full specifications

Case

9 specs
Category
Diver
GMT
Diameter
42mm
39mm
Thickness
12.9mm
13.5mm
Lug-to-Lug
48.6mm
46.8mm
Lug Width
20mm
21mm
Material
Stainless Steel
Ceramic
Finish
Brushed and polished
Water Resistance
200m
100m
Caseback
Solid
Screw-down case back

Crystal & Dial

5 specs
Crystal Shape
Flat
AR Coating
Anti-reflective coating on inner surface
Both sides
Dial Color
Black
Anthracite
Indices
Applied
Applied Arabic numerals
Lume
LumiBrite on hands, index(es) and bezel
Super-LumiNova

Movement

6 specs
Caliber
6R54
L844.4
Beat Rate
28,800 vph
25,200 vph
Jewels
24
0
Hacking
Yes
No
Hand-winding
Yes
No
Complications
None
Hours, minutes, seconds and date, 24 hours hand with time zone mechanism

Pricing

1 specs
MSRP
$1,500
$3,550

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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 1968 Heritage Diver's GMT

The Seiko Prospex Sea 1968 Heritage Diver's GMT is widely praised for its build quality, finishing, and comfortable wearability, offering good value for its price point. Owners and reviewers highlight the attractive silver/white sunray dial, blue ceramic bezel, and the premium feel of the improved bracelet clasp with excellent micro-adjustment. The Caliber 6R54 movement provides a 72-hour power reserve, and real-world accuracy often exceeds its stated range of +25 to -15 seconds per day, with some owners reporting figures around +3 to +5 seconds per day. However, the caller-style GMT functionality is a point of contention for some, who find the GMT scale difficult to read and prefer a flyer GMT at this price. Some also find the crown position at 4 o'clock undesirable, and a few note a lack of dial contrast or illegibility of the inner bezel.

Longines SPIRIT ZULU TIME

Owners widely praise the Longines Spirit Zulu Time for its excellent fit and finish, visual appeal, and value, with many preferring its thinner titanium case and color-matched date wheel. Reviewers highlight its legibility and comfortable 39mm wearability, while some owners note the bracelet could be weightier and lacks tool-less micro-adjustment. Accuracy figures range from +5 seconds per day to unspecified, and one owner reported condensation risk in hot tubs. On balance, owners and reviewers rate the Longines Spirit Zulu Time highly for its blend of tool-watch utility and segment-leading finishing at its price point.

From video reviewers

The 18k gold capped bezel insert is a notable feature, adding a touch of luxury to the watch. However, the watch's lume is not as bright as some reviewers would like, which is a drawback for those who prioritize good illumination. Reviewers disagree on the watch's functionality, with some considering it a compelling option and others feeling it doesn't quite live up to its design.

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