Side by side

Formex Reef 42 mmvsTissot Gentleman Open Heart

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
Gentleman Open Heart
TissotGentleman Open Heart
MSRP $1,025

At a glance

14 of 29 specs differ
Diameter
Reef 42 mm42mm
Gentleman Open Heart40mm
Power Reserve
Reef 42 mm56h
Gentleman Open Heart80h
Water Resistance
Reef 42 mm300m
Gentleman Open Heart100m
MSRP
Reef 42 mm$2,414
Gentleman Open Heart$1,025

Full specifications

Case

6 specs
Category
Diver
Chronograph
Diameter
42mm
40mm
Thickness
11.4mm
11.5mm
Lug-to-Lug
47mm
40mm
Lug Width
22mm
21mm
Water Resistance
300m
100m

Crystal & Dial

5 specs
Crystal Shape
Flat
Domed
AR Coating
Inner
Yes
Dial Color
Black
Silver
Indices
Applied
Indexes
Lume
Super-LumiNova
Super-LumiNova ®

Movement

2 specs
Caliber
Sellita SW300-1
11 1/2'''
Power Reserve
56h
80h

Pricing

1 specs
MSRP
$2,414
$1,025

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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.

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.

Tissot Gentleman Open Heart

Owners widely praise the Tissot Gentleman Open Heart for its versatile dressy-sporty aesthetic and elegant sunburst dial finish, with one owner preferring its less shiny blue dial compared to other versions. The watch offers excellent fit and bracelet adjustability, and its modified Powermatic 80 movement achieves COSC-level accuracy of -3 to +5 seconds/day, though the seconds hand movement is slightly less smooth at 6 movements per second. However, one owner reported the watch arrived non-functional, requiring a return due to an inoperable movement. On balance, owners rate the Tissot Gentleman Open Heart highly for its aesthetic appeal and accurate timekeeping, despite a reported instance of a faulty movement.

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