Side by side

NOMOS Glashütte Ahoi neomatik siren bluevsFortis Flieger F-43 Bicompax

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

At a glance

15 of 29 specs differ
Diameter
Ahoi neomatik siren blue36.3mm
Flieger F-43 Bicompax43mm
Power Reserve
Ahoi neomatik siren blue43 hoursh
Flieger F-43 Bicompax58h
Water Resistance
Ahoi neomatik siren blue200m
Flieger F-43 Bicompax200m
MSRP
Ahoi neomatik siren blue$4,540
Flieger F-43 Bicompax$4,180

Full specifications

Case

7 specs
Category
Tool
Chronograph
Diameter
36.3mm
43mm
Thickness
9.6mm
14.5mm
Lug-to-Lug
45.5mm
Lug Width
18mm
22mm
Finish
Brushed and polished
Caseback
Solid

Crystal & Dial

4 specs
Crystal Shape
Flat
AR Coating
Inner
Dial Color
Blue
Original
Indices
Applied

Movement

3 specs
Caliber
DUW 3001
Sellita SW510 BH a
Beat Rate
21,600 vph
28,800 vph
Power Reserve
43 hoursh
58h

Pricing

1 specs
MSRP
$4,540
$4,180

Follow this matchup

Get a note when NOMOS Glashütte Ahoi neomatik siren blue vs Fortis Flieger F-43 Bicompax gets more votes, a community discussion, or a price drop. No account needed.

What people say

Owners + reviewers, side by side

Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.

NOMOS Glashütte Ahoi neomatik siren blue

Owners and reviewers widely praise the NOMOS Glashütte Ahoi neomatik siren blue for its vibrant siren blue dial, which pops in any light, and its Bauhaus design language with arresting simplicity. The subtle rose gold accents, neon orange details, and color-matched date window at 6 o'clock are noted as well-thought-out elements. The slim 9.8mm case and 200m water resistance are also highlighted. However, the lume on the hour markers is considered weak and fades quickly, and the watch is not a true ISO-certified diver due to the lack of a dive bezel. Some find the textile strap too casual for anything beyond sophisticated casual wear, and the straight lugs can create a large feel on the wrist. The DUW 3001 movement offers a 43-hour power reserve. On balance, owners and reviewers rate the NOMOS Glashütte Ahoi neomatik siren blue highly for its striking dial and refined, yet casual, aesthetic.

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.

Keep exploring

More watches worth a look

Matched to the watches above on size, movement, style and price — microbrands first. Open any one to dig in.

Adjacent matchups

People also compared

Comparisons nearby in the catalog — alternatives to the watches above paired against the matchup.