Side by side

Formex Reef 42 mmvsSeiko Prospex Marinemaster Seiko Diver’s Watch 60th Anniversary Limited Edition

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

Some links are affiliate links — lug2lug may earn a commission at no extra cost to you. Disclosures

Some links are affiliate links — lug2lug may earn a commission at no extra cost to you. Disclosures

What people say

Owners + reviewers, side by side

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

Formex Reef 42 mm

The Formex Reef 42 mm is widely praised for its comfortable bracelet featuring a micro-adjust clasp, COSC-certified Sellita movement, and excellent build quality. Owners appreciate the gradient dial's visual appeal and the overall wearability. Some owners note the seconds hand does not perfectly align with markers, and one owner found the lugs' taper hinders third-party strap fit. The bracelet's length and sporty design are noted as limiting versatility by some. On balance, owners and reviewers rate the Formex Reef 42 mm highly for its impressive wearability and value at the price point.

Seiko Prospex Marinemaster Seiko Diver’s Watch 60th Anniversary Limited Edition

Owners widely praise the Prospex Marinemaster Seiko Diver’s Watch 60th Anniversary Limited Edition's titanium monobloc case construction and the dial's blue gradient finish. Some owners find the 45.4mm diameter and 16mm thickness too large, noting a poor dial-to-bezel ratio and excessive text on the dial. The 8L45 movement offers a 72-hour power reserve, with reported accuracy ranging from +10/-5 seconds per day to +25/-15 seconds per day. On balance, owners appreciate the watch's tool watch vibe and unique dial construction, despite some reservations about its size and price.

At a glance

13 of 29 specs differ
Diameter
Reef 42 mm42mm
Prospex Marinemaster Seiko Diver’s Watch 60th Anniversary Limited Edition45.4mm
Power Reserve
Reef 42 mm56h
Prospex Marinemaster Seiko Diver’s Watch 60th Anniversary Limited Edition72h
Water Resistance
Reef 42 mm300m
Prospex Marinemaster Seiko Diver’s Watch 60th Anniversary Limited Edition600m
MSRP
Reef 42 mm$2,414
Prospex Marinemaster Seiko Diver’s Watch 60th Anniversary Limited Edition$4,600

Full specifications

Case

5 specs
Diameter
42mm
45.4mm
Thickness
11.4mm
16mm
Lug-to-Lug
47mm
50.4mm
Material
Stainless Steel
Titanium
Water Resistance
300m
600m

Crystal & Dial

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

Movement

3 specs
Caliber
Sellita SW300-1
Seiko 8L45
Power Reserve
56h
72h
Jewels
0
35

Pricing

1 specs
MSRP
$2,414
$4,600
Keep exploring

More watches worth a look

Matched to the watches above on size, movement, style and price — microbrands first. Open any one to dig in.

Follow this matchup

Get a note when Formex Reef 42 mm vs Seiko Prospex Marinemaster Seiko Diver’s Watch 60th Anniversary Limited Edition gets more votes, a community discussion, or a price drop. No account needed.

Adjacent matchups

People also compared

Comparisons nearby in the catalog — alternatives to the watches above paired against the matchup.