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Nivada Grenchen F77 MK2 41mm AutomaticvsSeiko Prospex Sea 1968 Heritage Diver's GMT

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

What people say

Owners + reviewers, side by side

Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.

Nivada Grenchen F77 MK2 41mm Automatic

The Nivada Grenchen F77 MK2 41mm Automatic is praised for its comfortable wearability, with reviewers highlighting its reworked integrated lug design and slim case profile. The "carbon effect" basketweave dial is frequently cited as a modern, distinctive touch on the retro design. The watch is powered by the Soprod P024 automatic movement, which has a 38-hour power reserve. Some find the gold-plated version loud, and the dauphine hands lack lume. The stainless steel model is priced at $1,460 to $1,560 USD. On balance, reviewers consider the Nivada Grenchen F77 MK2 41mm Automatic a strong integrated bracelet option at its price point, lauded for its unique design and comfortable fit.

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.

At a glance

16 of 29 specs differ
Diameter
F77 MK2 41mm Automatic41mm
Prospex Sea 1968 Heritage Diver's GMT42mm
Power Reserve
F77 MK2 41mm Automatic38h
Prospex Sea 1968 Heritage Diver's GMT72h
Water Resistance
F77 MK2 41mm Automatic100m
Prospex Sea 1968 Heritage Diver's GMT200m
MSRP
F77 MK2 41mm Automatic$1,460
Prospex Sea 1968 Heritage Diver's GMT$1,500

Full specifications

Case

7 specs
Category
Sport
Diver
Diameter
41mm
42mm
Thickness
12.2mm
12.9mm
Lug-to-Lug
46.2mm
48.6mm
Lug Width
22mm
20mm
Water Resistance
100m
200m
Caseback
316L Steel Caseback

Crystal & Dial

4 specs
AR Coating
Underside
Anti-reflective coating on inner surface
Dial Color
Meteorite
Indices
Applied
Lume
Super-LumiNova
LumiBrite on hands, index(es) and bezel

Movement

4 specs
Caliber
Soprod M100
6R54
Beat Rate
28 vph
0 vph
Power Reserve
38h
72h
Jewels
25
24

Pricing

1 specs
MSRP
$1,460
$1,500
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