Side by side

Nivada Grenchen F77 MK2 41mm AutomaticvsSeiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition

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

At a glance

16 of 29 specs differ
Diameter
F77 MK2 41mm Automatic41mm
Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition40.5mm
Power Reserve
F77 MK2 41mm Automatic38h
Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition70h
Water Resistance
F77 MK2 41mm Automatic100m
Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition200m
MSRP
F77 MK2 41mm Automatic$1,460
Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition$1,250

Full specifications

Case

7 specs
Category
Sport
Diver
Diameter
41mm
40.5mm
Thickness
12.2mm
13.2mm
Lug-to-Lug
46.2mm
47.6mm
Lug Width
22mm
20mm
Water Resistance
100m
200m
Caseback
316L Steel Caseback
Solid

Crystal & Dial

4 specs
Crystal Shape
Flat
Curved
AR Coating
Underside
Anti-reflective coating on inner surface
Dial Color
Meteorite
Black
Lume
Super-LumiNova
LumiBrite on hands, index(es) and bezel

Movement

4 specs
Caliber
Soprod M100
6R35
Beat Rate
28 vph
28,800 vph
Power Reserve
38h
70h
Jewels
25
24

Pricing

1 specs
MSRP
$1,460
$1,250

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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.

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 1965 Heritage Diver's Save the Ocean Special Edition

Owners widely praise the Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition for its unique dial color and execution, with one owner noting its 44mm lug-to-lug measurement is perfect for most wrists. The dial is inspired by Okinawa's ocean colors and is expected to feature a bright sunburst effect. Accuracy figures for the 6R35 movement range from -10/+10 seconds per day when off/on the wrist, which some find "pretty amazing." However, some owners consider the price of around 1500€ too high, suggesting a value closer to 900€, and there are mixed reports on the 6R movement's accuracy. Overall, owners rate the Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition highly for its distinctive dial and wearability, despite some reservations about its price point.

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