Side by side

Boldr Expedition EnigmathvsFormex Reef 39.5 mm

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

Expedition Enigmath
BoldrExpedition Enigmath
MSRP $599
Reef 39.5 mm
FormexReef 39.5 mm
MSRP $2,230

At a glance

11 of 29 specs differ
Diameter
Expedition Enigmath41mm
Reef 39.5 mm39.5mm
Power Reserve
Expedition Enigmath42h
Reef 39.5 mm56h
Water Resistance
Expedition Enigmath200m
Reef 39.5 mm300m
MSRP
Expedition Enigmath$599
Reef 39.5 mm$2,230

Full specifications

Case

6 specs
Category
Tool
Diver
Diameter
41mm
39.5mm
Thickness
12.8mm
11mm
Lug-to-Lug
47.5mm
45.5mm
Lug Width
20mm
22mm
Water Resistance
200m
300m

Crystal & Dial

2 specs
AR Coating
Yes
Inner
Dial Color
Enigmath Coconino
Bahama Blue

Movement

2 specs
Caliber
Miyota 9039,
Sellita SW300-1
Power Reserve
42h
56h

Pricing

1 specs
MSRP
$599
$2,230

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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.

Boldr Expedition Enigmath

The watch's slide rule function is a convenient feature, allowing for calculations on the go. One potential drawback is the use of the Japanese Miyota 9039 movement, which may be a trade-off for some buyers. Reviewers disagree on whether the quick 'on the fly' adjust bracelet is a more significant advantage than the watch's sapphire crystal for durability and scratch resistance.

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.

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