Which is cheaper, the Fortis Flieger F-39 Werk 7 or the Spinnaker Croft Mid-Size Skeleton?

At MSRP the Spinnaker Croft Mid-Size Skeleton is the cheaper of the two at $425, against $4,510 for the Fortis Flieger F-39 Werk 7 — a $4,085 gap before any retailer discounting.

Which is bigger, the Fortis Flieger F-39 Werk 7 or the Spinnaker Croft Mid-Size Skeleton?

The Spinnaker Croft Mid-Size Skeleton wears larger at 40mm versus 39mm for the Fortis Flieger F-39 Werk 7 — a 1mm difference across the dial.

Which has better water resistance, the Fortis Flieger F-39 Werk 7 or the Spinnaker Croft Mid-Size Skeleton?

The Fortis Flieger F-39 Werk 7 is rated to 200m versus 100m for the Spinnaker Croft Mid-Size Skeleton.

Which has a longer power reserve, the Fortis Flieger F-39 Werk 7 or the Spinnaker Croft Mid-Size Skeleton?

The Spinnaker Croft Mid-Size Skeleton carries a 40-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 Spinnaker Croft Mid-Size Skeleton?

Both watches run automatic movements — the Fortis Flieger F-39 Werk 7 uses the Werk 7 (Manufacture) and the Spinnaker Croft Mid-Size Skeleton uses the SII NH38A.

Side by side

Fortis Flieger F-39 Werk 7vsSpinnaker Croft Mid-Size Skeleton

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

Spinnaker Croft Mid-Size Skeleton

croft-mid-size-skeleton-automatic-spongebob-squarepants-peek-a-boo-limited-edition-dollar-diver-sp-5152-01

MSRP $425

At a glance

11 of 29 specs differ

Diameter

Flieger F-39 Werk 739mm

Croft Mid-Size Skeleton40mm

Power Reserve

Flieger F-39 Werk 738h

Croft Mid-Size Skeleton40h

Water Resistance

Flieger F-39 Werk 7200m

Croft Mid-Size Skeleton100m

MSRP

Flieger F-39 Werk 7$4,510

Croft Mid-Size Skeleton$425

Full specifications

Case

6 specs

Crystal & Dial

1 specs

Dial Color

Black

Dollar Diver

Movement

3 specs

Caliber

Werk 7 (Manufacture)

SII NH38A

Power Reserve

38h

40h

Jewels

Pricing

1 specs

MSRP

$4,510

$425

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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.

Spinnaker Croft Mid-Size Skeleton

The Spinnaker Croft Mid-Size Skeleton is noted for its 40mm steel case, sapphire crystal, and 150m water resistance. One owner reports strong performance from the TMI NH70 movement at -3 seconds per day, with very nice lume. On balance, owners find the Spinnaker Croft Mid-Size Skeleton to be a pretty nice option, particularly for its movement performance and lume.

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