Side by side

Formex Reef 42 mmvsSeiko Prospex LX line

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

Reef 42 mm
FormexReef 42 mm
MSRP $2,414
Prospex LX line
SeikoProspex LX line
MSRP $6,500

At a glance

11 of 29 specs differ
Diameter
Reef 42 mm42mm
Prospex LX line44.8mm
Power Reserve
Reef 42 mm56h
Prospex LX line72h
Water Resistance
Reef 42 mm300m
Prospex LX line300m
MSRP
Reef 42 mm$2,414
Prospex LX line$6,500

Full specifications

Case

4 specs
Diameter
42mm
44.8mm
Thickness
11.4mm
15.7mm
Lug-to-Lug
47mm
50.9mm
Material
Stainless Steel
Titanium

Crystal & Dial

2 specs
AR Coating
Inner
Anti-reflective coating on inner surface
Lume
Super-LumiNova
LumiBrite on hands and index(es)

Movement

4 specs
Caliber
Sellita SW300-1
5R65
Type
Automatic
Spring Drive
Power Reserve
56h
72h
Jewels
25
30

Pricing

1 specs
MSRP
$2,414
$6,500

Follow this matchup

Get a note when Formex Reef 42 mm vs Seiko Prospex LX line gets more votes, a community discussion, or a price drop. No account needed.

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 LX line

Owners widely report the Seiko Prospex LX line's finishing is a step up from other models, with a case that sits well on the wrist, and some praise the green sunburst dial with blue anti-reflective sapphire crystal as phenomenal. However, owners note the high MSRP limited sales, with some desiring smaller cases and a reduced price, and others experienced quality control issues such as detached second hands and peeling DLC coating, leading to concerns about fragility. On balance, owners feel the Seiko Prospex LX line was discontinued due to pricing that alienated its target market, despite its attractive dial.

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.

Adjacent matchups

People also compared

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