Side by side

Formex Reef 39.5 mmvsSeestern S443 Column Wheel Chronograph

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

Reef 39.5 mm
FormexReef 39.5 mm
MSRP $2,230
What people say

Owners + reviewers, side by side

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

Formex Reef 39.5 mm

The Formex Reef 39.5 mm is widely praised for its refined finishing, comfortable and well-proportioned case design, and impressive specifications for its price point, including COSC-certified Sellita SW300-1 movement and 300m water resistance. Owners and reviewers highlight the tool-less micro-adjust clasp and quick-release spring bars as practical features. Some reviewers note that the 22mm lug width feels slightly disproportionate to the smaller case, and the bracelet could benefit from more taper, though this is a point of contention for some owners who value the overall package. A prototype crown protrusion issue is noted as being addressed for production. On balance, owners and reviewers rate the Formex Reef 39.5 mm highly for its excellent value and well-executed design.

Seestern S443 Column Wheel Chronograph

Owners widely praise the Seestern S443 Column Wheel Chronograph for its affordable mechanical chronograph movement with a column wheel, derived from the Venus 175. Some owners appreciate the watch's overall aesthetic, with one noting a preference for the black-yellow variant. The ST19 movement's execution is generally well-regarded, though one owner found the chronograph minute counter could stick, a common issue that may require a watchmaker, while another noted sticky chrono pushers after patina development on the bronze case. The ST19 movement lacks an hours totalizer, and its assembly is not as refined as luxury timepieces, though comparable to entry-level automatics. One owner finds the "hand winding" script font on the dial to be a design flaw. Overall, owners rate the Seestern S443 Column Wheel Chronograph highly for its value as a column wheel chronograph, despite minor assembly and functional quirks.

At a glance

17 of 29 specs differ
Diameter
Reef 39.5 mm39.5mm
S443 Column Wheel Chronograph40mm
Power Reserve
Reef 39.5 mm56h
S443 Column Wheel Chronograph45hh
Water Resistance
Reef 39.5 mm300m
S443 Column Wheel Chronograph50m
MSRP
Reef 39.5 mm$2,230
S443 Column Wheel Chronograph$10

Full specifications

Case

7 specs
Category
Diver
Chronograph
Diameter
39.5mm
40mm
Thickness
11mm
13mm
Lug-to-Lug
45.5mm
48.6mm
Lug Width
22mm
20mm
Material
Stainless Steel
316L Stainless Steel
Water Resistance
300m
50m

Crystal & Dial

3 specs
Dial Color
Bahama Blue
Pink
Indices
Applied
3D
Lume
Super-LumiNova
Super BGW9

Movement

6 specs
Caliber
Sellita SW300-1
Seagull ST1901
Type
Automatic
Manual
Beat Rate
28,800 vph
3 vph
Power Reserve
56h
45hh
Jewels
25
21
Complications
None
Chronograph, Column Wheel

Pricing

1 specs
MSRP
$2,230
$10
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.

Follow this matchup

Get a note when Formex Reef 39.5 mm vs Seestern S443 Column Wheel Chronograph gets more votes, a community discussion, or a price drop. No account needed.

Adjacent matchups

People also compared

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