Side by side

Formex Reef 39.5 mmvsTuseno Shellback

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

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 39.5 mm

The Formex Reef 39.5 mm is widely praised for its refined finishing, comfortable and well-proportioned case design, and impressive specifications for its price point, including COSC-certified Sellita SW300-1 movement and 300m water resistance. Owners and reviewers highlight the tool-less micro-adjust clasp and quick-release spring bars as practical features. Some reviewers note that the 22mm lug width feels slightly disproportionate to the smaller case, and the bracelet could benefit from more taper, though this is a point of contention for some owners who value the overall package. A prototype crown protrusion issue is noted as being addressed for production. On balance, owners and reviewers rate the Formex Reef 39.5 mm highly for its excellent value and well-executed design.

Tuseno Shellback

The build quality is cited as a significant strength. Availability is a weakness, with stock running low.

At a glance

10 of 29 specs differ
Diameter
Reef 39.5 mm39.5mm
Shellback40mm
Power Reserve
Reef 39.5 mm56h
Shellback
Water Resistance
Reef 39.5 mm300m
Shellback200m
MSRP
Reef 39.5 mm$2,230
Shellback$840

Full specifications

Case

6 specs
Category
Diver
Diameter
39.5mm
40mm
Thickness
11mm
11.9mm
Lug-to-Lug
45.5mm
47mm
Lug Width
22mm
20mm
Water Resistance
300m
200m

Crystal & Dial

1 specs
Dial Color
Bahama Blue
Yellow

Movement

2 specs
Caliber
Sellita SW300-1
Sellita SW200-1
Power Reserve
56h

Pricing

1 specs
MSRP
$2,230
$840
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