Side by side

Formex Reef 39.5 mmvsTissot Seastar 1000 Quartz 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
Seastar 1000 Quartz Chronograph
TissotSeastar 1000 Quartz Chronograph
MSRP $650

At a glance

12 of 29 specs differ
Diameter
Reef 39.5 mm39.5mm
Seastar 1000 Quartz Chronograph38mm
Power Reserve
Reef 39.5 mm56h
Seastar 1000 Quartz Chronograph40h
Water Resistance
Reef 39.5 mm300m
Seastar 1000 Quartz Chronograph300m
MSRP
Reef 39.5 mm$2,230
Seastar 1000 Quartz Chronograph$650

Full specifications

Case

4 specs
Diameter
39.5mm
38mm
Thickness
11mm
12.95mm
Lug-to-Lug
45.5mm
38mm
Lug Width
22mm
18mm

Crystal & Dial

4 specs
AR Coating
Inner
Yes
Dial Color
Bahama Blue
Graded turquoise
Indices
Applied
Indexes
Lume
Super-LumiNova
Super-LumiNova ®

Movement

3 specs
Caliber
Sellita SW300-1
Type
Automatic
Quartz
Power Reserve
56h
40h

Pricing

1 specs
MSRP
$2,230
$650

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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.

Tissot Seastar 1000 Quartz Chronograph

The Tissot Seastar 1000 Quartz Chronograph is widely praised for its excellent value, solid build, and 300m water resistance, making it a capable summer watch. Owners appreciate its comfortable size, with one noting the 40mm variant as a "just right" fit, and others highlighting the attractive mineral bezels and throwback aesthetics of certain colorways. The watch features adequate lume on the dial and hands, with a green lume pip on the bezel, and a screw-down crown with decent grip. However, some criticisms have been raised. Reviewers and owners note a non-reflective crystal that can cause glare, mediocre lume in general, and excessive polishing on the case. The bracelet and clasp are frequently described as rattly and flimsy, with one owner finding the 19mm lug width too thin. There are also comments about a busy dial, ill-proportioned hands and indices, and a bezel that can be hard to read in certain light.

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