Side by side

Seiko Prospex Sea 1968 Heritage Diver's GMTvsYema Yachtingraff Seconde/Seconde/

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
Yachtingraff Seconde/Seconde/
YemaYachtingraff Seconde/Seconde/
MSRP $499

At a glance

15 of 29 specs differ
Diameter
Prospex Sea 1968 Heritage Diver's GMT42mm
Yachtingraff Seconde/Seconde/38.5mm
Power Reserve
Prospex Sea 1968 Heritage Diver's GMT72h
Yachtingraff Seconde/Seconde/40h
Water Resistance
Prospex Sea 1968 Heritage Diver's GMT200m
Yachtingraff Seconde/Seconde/50m
MSRP
Prospex Sea 1968 Heritage Diver's GMT$1,500
Yachtingraff Seconde/Seconde/$499

Full specifications

Case

7 specs
Category
Diver
Chronograph
Diameter
42mm
38.5mm
Thickness
12.9mm
13mm
Lug-to-Lug
48.6mm
Lug Width
20mm
19mm
Material
Stainless Steel
316L Stainless Steel
Water Resistance
200m
50m

Crystal & Dial

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

Movement

4 specs
Caliber
6R54
Type
Automatic
Quartz
Power Reserve
72h
40h
Jewels
24
25

Pricing

1 specs
MSRP
$1,500
$499

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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.

Yema Yachtingraff Seconde/Seconde/

The Yema Yachtingraff Seconde/Seconde/ is a collaboration watch featuring a hand-painted graffiti-style dial with wet paint drips and spray can pushers, powered by a Seiko VK63 meca-quartz movement. One owner noted slight marks on the lugs, bezel, and case of a pre-owned example, rating its condition at 88%. On balance, reviewers highlight the artistic and humorous blend of design elements as the watch's primary appeal.

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