Side by side

Formex Reef 39.5 mmvsSpinnaker Fleuss 40 Automatic

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

Reef 39.5 mm
FormexReef 39.5 mm
MSRP $2,230
Fleuss 40 Automatic
SpinnakerFleuss 40 Automatic
MSRP $450

At a glance

10 of 29 specs differ
Diameter
Reef 39.5 mm39.5mm
Fleuss 40 Automatic40mm
Power Reserve
Reef 39.5 mm56h
Fleuss 40 Automatic40h
Water Resistance
Reef 39.5 mm300m
Fleuss 40 Automatic150m
MSRP
Reef 39.5 mm$2,230
Fleuss 40 Automatic$450

Full specifications

Case

5 specs
Diameter
39.5mm
40mm
Lug-to-Lug
45.5mm
47mm
Lug Width
22mm
20mm
Material
Stainless Steel
316L Stainless Steel
Water Resistance
300m
150m

Crystal & Dial

2 specs
Dial Color
Bahama Blue
Coral
Lume
Super-LumiNova
None

Movement

2 specs
Caliber
Sellita SW300-1
SII NH35A
Power Reserve
56h
40h

Pricing

1 specs
MSRP
$2,230
$450

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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 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.

Spinnaker Fleuss 40 Automatic

Owners find the Spinnaker Fleuss 40 Automatic a good size for smaller wrists, though one owner notes the lume is too diffuse for easy nighttime reading. The pilot-style crown is an unusual feature for a dive watch. Overall, owners value the Spinnaker Fleuss 40 Automatic for its wearability on smaller wrists.

From video reviewers

The coral red dial is a unique aesthetic. The watch is a strong contender for best-in-class under $300.

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