Side by side

Formex Reef 39.5 mmvsSeiko King Seiko KS1969

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
King Seiko KS1969
SeikoKing Seiko KS1969
MSRP $3,100

At a glance

14 of 29 specs differ
Diameter
Reef 39.5 mm39.5mm
King Seiko KS196939.4mm
Power Reserve
Reef 39.5 mm56h
King Seiko KS196945h
Water Resistance
Reef 39.5 mm300m
King Seiko KS196950m
MSRP
Reef 39.5 mm$2,230
King Seiko KS1969$3,100

Full specifications

Case

6 specs
Category
Diver
Dress
Diameter
39.5mm
39.4mm
Thickness
11mm
9.9mm
Lug-to-Lug
45.5mm
43.6mm
Lug Width
22mm
19mm
Water Resistance
300m
50m

Crystal & Dial

4 specs
Crystal Shape
Flat
Box
AR Coating
Inner
Anti-reflective coating on inner surface
Dial Color
Bahama Blue
Black
Lume
Super-LumiNova
None

Movement

3 specs
Caliber
Sellita SW300-1
6L35
Power Reserve
56h
45h
Jewels
25
26

Pricing

1 specs
MSRP
$2,230
$3,100

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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.

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.

Seiko King Seiko KS1969

The King Seiko KS1969 is praised for its Grand Seiko-level finishing and a slim 9.9mm case, with one owner noting it is indistinguishable from new and includes original packaging. However, the $3,100-$3,200 price point is widely questioned, with some finding the looks pedestrian and the branding jarring. Accuracy from the 6L35 movement is noted as +15/-10 seconds per day, and some owners feel the new case shape, dial colors, and end links deviate from the classic KS aesthetic. On balance, owners and reviewers are divided on the King Seiko KS1969, with the high price and modern design choices being the primary points of contention.

From video reviewers

The slim case profile under 10mm and compact lug-to-lug dimensions provide a comfortable fit. The dial's modern appeal and the collection's homage to vintage pieces are highlighted. Reviewers did not reach a consensus on any weaknesses or points of disagreement.

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