Which is cheaper, the Fortis Flieger F-39 Werk 7 or the Formex Reef 42 mm?

At MSRP the Formex Reef 42 mm is the cheaper of the two at $2,414, against $4,510 for the Fortis Flieger F-39 Werk 7 — a $2,096 gap before any retailer discounting.

Which is bigger, the Fortis Flieger F-39 Werk 7 or the Formex Reef 42 mm?

The Formex Reef 42 mm wears larger at 42mm versus 39mm for the Fortis Flieger F-39 Werk 7 — a 3mm difference across the dial.

Which has better water resistance, the Fortis Flieger F-39 Werk 7 or the Formex Reef 42 mm?

The Formex Reef 42 mm is rated to 300m versus 200m for the Fortis Flieger F-39 Werk 7.

Which has a longer power reserve, the Fortis Flieger F-39 Werk 7 or the Formex Reef 42 mm?

The Formex Reef 42 mm carries a 56-hour power reserve against 38 hours on the Fortis Flieger F-39 Werk 7.

What movement does the Fortis Flieger F-39 Werk 7 run compared to the Formex Reef 42 mm?

Both watches run automatic movements — the Fortis Flieger F-39 Werk 7 uses the Werk 7 (Manufacture) and the Formex Reef 42 mm uses the Sellita SW300-1.

Side by side

Fortis Flieger F-39 Werk 7vsFormex Reef 42 mm

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

Fortis Flieger F-39 Werk 7

F-39 Werk 7

MSRP $4,510

Formex Reef 42 mm

reef-42mm-automatic-cosc-300m-black

MSRP $2,414

At a glance

11 of 29 specs differ

Diameter

Flieger F-39 Werk 739mm

Reef 42 mm42mm

Power Reserve

Flieger F-39 Werk 738h

Reef 42 mm56h

Water Resistance

Flieger F-39 Werk 7200m

Reef 42 mm300m

MSRP

Flieger F-39 Werk 7$4,510

Reef 42 mm$2,414

Full specifications

Case

6 specs

Crystal & Dial

1 specs

Lume

None

Super-LumiNova

Movement

3 specs

Caliber

Werk 7 (Manufacture)

Sellita SW300-1

Power Reserve

38h

56h

Jewels

Pricing

1 specs

MSRP

$4,510

$2,414

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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.

Fortis Flieger F-39 Werk 7

The Fortis Flieger is widely praised for its superb readability, robust build quality, and phenomenal fit and finish, with reviewers noting the practical Type-A dial and utilitarian design. The F-39 models are noted to wear large due to their lug-to-lug distance, and the UW-30 movement offers a 38-hour power reserve, while other variants feature a 70-hour power reserve. On balance, reviewers highlight the Fortis Flieger's modern, stylish take on pilot's watches, balancing legibility with unique aesthetics.

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.

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