Which is cheaper, the Fortis Flieger F-43 Bicompax or the Spinnaker Spence 300?

At MSRP the Spinnaker Spence 300 is the cheaper of the two at $650, against $4,180 for the Fortis Flieger F-43 Bicompax — a $3,530 gap before any retailer discounting.

Which is bigger, the Fortis Flieger F-43 Bicompax or the Spinnaker Spence 300?

The Fortis Flieger F-43 Bicompax wears larger at 43mm versus 40mm for the Spinnaker Spence 300 — a 3mm difference across the dial.

Which has better water resistance, the Fortis Flieger F-43 Bicompax or the Spinnaker Spence 300?

The Spinnaker Spence 300 is rated to 300m versus 200m for the Fortis Flieger F-43 Bicompax.

Which has a longer power reserve, the Fortis Flieger F-43 Bicompax or the Spinnaker Spence 300?

The Fortis Flieger F-43 Bicompax carries a 58-hour power reserve against 40 hours on the Spinnaker Spence 300.

What movement does the Fortis Flieger F-43 Bicompax run compared to the Spinnaker Spence 300?

Both watches run automatic movements — the Fortis Flieger F-43 Bicompax uses the Sellita SW510 BH a and the Spinnaker Spence 300 uses the SII NH35A.

Side by side

Fortis Flieger F-43 BicompaxvsSpinnaker Spence 300

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

Fortis Flieger F-43 Bicompax

F-43 Bicompax

MSRP $4,180

Spinnaker Spence 300

spence-300-automatic-aquamarine-sp-5097-aa

MSRP $650

At a glance

12 of 29 specs differ

Diameter

Flieger F-43 Bicompax43mm

Spence 30040mm

Power Reserve

Flieger F-43 Bicompax58h

Spence 30040h

Water Resistance

Flieger F-43 Bicompax200m

Spence 300300m

MSRP

Flieger F-43 Bicompax$4,180

Spence 300$650

Full specifications

Case

7 specs

Crystal & Dial

1 specs

Dial Color

Original

Aquamarine

Movement

3 specs

Caliber

Sellita SW510 BH a

SII NH35A

Power Reserve

58h

40h

Jewels

Pricing

1 specs

MSRP

$4,180

$650

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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-43 Bicompax

Owners widely praise the Fortis Original for its tool-watch aesthetic, legibility, and robust construction, with many noting excellent lume that lasts all night and precise day/date changes at midnight. The brushed stainless steel case is well-finished, and the 38mm size is considered comfortable and well-weighted despite being smaller than modern watches. Accuracy figures range from +2 seconds/day to +8 seconds/day, and some owners compare Fortis quality favorably to Omega. However, some users find the MSRP too high compared to brands like Sinn and Damasko, and one owner reported internal parts dislodging from a limited edition model. Concerns have also been raised about stripped lug screws on B-42 models and potential parts shortages due to past bankruptcy protection filings. Overall, owners rate the Fortis Original highly for its durable construction and tool-watch functionality at a competitive price point.

WatchUSeek·9

Spinnaker Spence 300

The Spinnaker Spence 300 is widely praised for its slim 10.9mm case and 40mm diameter, offering a comfortable and uncommon thin diver design at its price point. Reviewers and owners highlight its value, especially below $350, and its blend of retro design with modern specifications, including a 300m depth rating and a fully indexed bezel. Some owners, however, find the dial printing and bracelet finishing to be less refined, with one noting the bracelet's male end links as a drawback. The consensus is that the Spinnaker Spence 300 is highly regarded for its exceptional value and wearable dimensions, making it a strong contender for an everyday sports watch.

Fratello

WatchUSeek

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