Side by side

Fortis Flieger F-43 BicompaxvsGrand Seiko SLGB023

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
SLGB023
Grand SeikoSLGB023
MSRP $12,400

At a glance

14 of 29 specs differ
Diameter
Flieger F-43 Bicompax43mm
SLGB02340.8mm
Power Reserve
Flieger F-43 Bicompax58h
SLGB02372h
Water Resistance
Flieger F-43 Bicompax200m
SLGB023300m
MSRP
Flieger F-43 Bicompax$4,180
SLGB023$12,400

Full specifications

Case

7 specs
Category
Chronograph
Diver
Diameter
43mm
40.8mm
Thickness
14.5mm
12.9mm
Lug-to-Lug
48.5mm
Lug Width
22mm
21mm
Material
Stainless Steel
Titanium
Water Resistance
200m
300m

Crystal & Dial

2 specs
AR Coating
Inner
Yes
Dial Color
Original
Black

Movement

4 specs
Caliber
Sellita SW510 BH a
9RB1
Type
Automatic
Spring Drive
Power Reserve
58h
72h
Jewels
27
25

Pricing

1 specs
MSRP
$4,180
$12,400

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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.

Grand Seiko SLGB023

Owners and reviewers widely praise the Grand Seiko SLGB023 for its comfortable 40.8mm titanium case and the smooth winding feel of its Spring Drive 9RB1 movement. The dial's gradient blue "ushio" motif is a highlight, though some reviewers note the bezel's fully lumed scale as a missed opportunity. Enthusiasts are divided on the power reserve indicator's placement and the design of the hour and minute hands. Overall, owners and reviewers rate the Grand Seiko SLGB023 highly for its comfortable titanium case and the refined Spring Drive movement.

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