Side by side

Fortis Flieger F-43 BicompaxvsSugess Seestern S434 Pro Diver

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

Flieger F-43 Bicompax
FortisFlieger F-43 Bicompax
MSRP $4,180
Seestern S434 Pro Diver
SugessSeestern S434 Pro Diver
MSRP $249

At a glance

15 of 29 specs differ
Diameter
Flieger F-43 Bicompax43mm
Seestern S434 Pro Diver40mm
Power Reserve
Flieger F-43 Bicompax58h
Seestern S434 Pro Diver40h
Water Resistance
Flieger F-43 Bicompax200m
Seestern S434 Pro Diver200m
MSRP
Flieger F-43 Bicompax$4,180
Seestern S434 Pro Diver$249

Full specifications

Case

7 specs
Category
Chronograph
Diver
Diameter
43mm
40mm
Thickness
14.5mm
12mm
Lug-to-Lug
46mm
Lug Width
22mm
20mm
Material
Stainless Steel
Stainless Steel/Rose Gold
Caseback
Solid
Engraved

Crystal & Dial

2 specs
Dial Color
Original
2 Salmon
Lume
None
Super-LumiNova BGW9

Movement

5 specs
Caliber
Sellita SW510 BH a
NH35
Beat Rate
28,800 vph
3 vph
Power Reserve
58h
40h
Jewels
27
25
Complications
None
GMT, Chronograph, Moonphase, Date

Pricing

1 specs
MSRP
$4,180
$249

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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.

Sugess Seestern S434 Pro Diver

Owners widely praise the Sugess Seestern S434 Pro Diver for its impressive finishing and craftsmanship at its price point, highlighting the applied indices that play with light, excellent BGW9 lume, and attractive color options. Specific positive notes include the domed sapphire crystal, short lug-to-lug, and on-the-fly clasp adjustment. However, some owners report quality control issues such as misaligned bezels or indices, while others with V2 models experience no such problems. Caveats include slight bezel back play, light AR coating on the crystal, and a clasp that could be smoother, with one owner desiring a color-matched date wheel. On balance, owners rate the Sugess Seestern S434 Pro Diver highly for its exceptional value and build quality, particularly the dial finishing and lume.

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