Side by side

Nivada Grenchen F77 MK2 41mm AutomaticvsSeiko Prospex Sea 1965 Heritage Diver's Watch

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

F77 MK2 41mm Automatic
Nivada GrenchenF77 MK2 41mm Automatic
MSRP $1,460

At a glance

16 of 29 specs differ
Diameter
F77 MK2 41mm Automatic41mm
Prospex Sea 1965 Heritage Diver's Watch40mm
Power Reserve
F77 MK2 41mm Automatic38h
Prospex Sea 1965 Heritage Diver's Watch72h
Water Resistance
F77 MK2 41mm Automatic100m
Prospex Sea 1965 Heritage Diver's Watch300m
MSRP
F77 MK2 41mm Automatic$1,460
Prospex Sea 1965 Heritage Diver's Watch$1,300

Full specifications

Case

7 specs
Category
Sport
Diver
Diameter
41mm
40mm
Thickness
12.2mm
13mm
Lug-to-Lug
46.2mm
46.4mm
Lug Width
22mm
20mm
Water Resistance
100m
300m
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
6R55
Beat Rate
28 vph
28,800 vph
Power Reserve
38h
72h
Jewels
25
24

Pricing

1 specs
MSRP
$1,460
$1,300

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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 Watch

The Seiko Prospex Sea 1965 Heritage Diver's Watch is praised for its refined engineering and updated features, including a 300m water resistance and a 72-hour power reserve from the Caliber 6R55 movement in a 40mm case. Owners note its better build quality and interesting finishing with a mix of polished and brushed surfaces. The "Tranquil Teal" variant features a jewel-toned dial with a rippling-water pattern. However, some owners consider the price too high, and concerns exist regarding the accuracy of the 6R movements, with some reporting theirs run slow. One review notes a reflective dial that impacts legibility. On balance, owners and reviewers appreciate the Seiko Prospex Sea 1965 Heritage Diver's Watch for its refined design and improved specifications over previous generations, despite some reservations about movement accuracy and price.

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