Side by side

Nivada Grenchen F77 MK2 41mm AutomaticvsSeiko Prospex Sea 1970 Heritage Diver's Black Series Limited 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 1970 Heritage Diver's Black Series Limited Edition44mm
Power Reserve
F77 MK2 41mm Automatic38h
Prospex Sea 1970 Heritage Diver's Black Series Limited Edition50h
Water Resistance
F77 MK2 41mm Automatic100m
Prospex Sea 1970 Heritage Diver's Black Series Limited Edition200m
MSRP
F77 MK2 41mm Automatic$1,460
Prospex Sea 1970 Heritage Diver's Black Series Limited Edition$3,300

Full specifications

Case

7 specs
Category
Sport
Diver
Diameter
41mm
44mm
Thickness
12.2mm
13mm
Lug-to-Lug
46.2mm
49.3mm
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
8L35
Beat Rate
28 vph
28,800 vph
Power Reserve
38h
50h
Jewels
25
26

Pricing

1 specs
MSRP
$1,460
$3,300

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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 1970 Heritage Diver's Black Series Limited Edition

Owners widely praise the Seiko Prospex Sea 1970 Heritage Diver's Black Series Limited Edition for its attractive, well-made design and gorgeous dial, noting its jewel-toned teal color and rippling-water pattern. The bezel action is smooth with a muted sound, and the case and bracelet offer a more comfortable feel than previous iterations. However, multiple owners express disappointment with the accuracy of the 6R movement at its price point, with some noting theirs runs slow, and consider the price too high. The steep rehaut and marker size make the 24-hour numbers difficult to read, and some find the case design makes the watch feel top-heavy despite wearing smaller. Overall, owners rate the Seiko Prospex Sea 1970 Heritage Diver's Black Series Limited Edition highly for its striking dial and refined case design, despite concerns regarding movement accuracy at its price.

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