Side by side

Hamilton Jazzmaster Thinline AutovsFormex Reef 39.5 mm

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

Jazzmaster Thinline Auto
HamiltonJazzmaster Thinline Auto
MSRP $1,145
Reef 39.5 mm
FormexReef 39.5 mm
MSRP $2,230

At a glance

11 of 29 specs differ
Diameter
Jazzmaster Thinline Auto40mm
Reef 39.5 mm39.5mm
Power Reserve
Jazzmaster Thinline Auto42h
Reef 39.5 mm56h
Water Resistance
Jazzmaster Thinline Auto50m
Reef 39.5 mm300m
MSRP
Jazzmaster Thinline Auto$1,145
Reef 39.5 mm$2,230

Full specifications

Case

6 specs
Category
Dress
Diver
Diameter
40mm
39.5mm
Thickness
8.45mm
11mm
Lug-to-Lug
46mm
45.5mm
Lug Width
20mm
22mm
Water Resistance
50m
300m

Crystal & Dial

2 specs
Dial Color
Beige
Bahama Blue
Lume
None
Super-LumiNova

Movement

2 specs
Caliber
2892-A2
Sellita SW300-1
Power Reserve
42h
56h

Pricing

1 specs
MSRP
$1,145
$2,230

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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.

Hamilton Jazzmaster Thinline Auto

Owners widely praise the Hamilton Jazzmaster Thinline Auto for its gorgeous, stunning, and captivating dials, particularly the champagne and burgundy variants, and its thin, comfortable profile, often noted at around 7mm to 8.4mm, making it ideal for wearability under shirt cuffs. The ETA 2892 movement is considered a strong value, though some owners report the rotor can be noisy and the winding feel unrefined, while others find the small crown difficult to manipulate. The absence of a second hand is polarizing, with some appreciating the simplicity and ease of setting, while others miss its presence. Overall, owners rate the Hamilton Jazzmaster Thinline Auto highly for its attractive, thin design and dial beauty at its price point.

From video reviewers

The slim case profile and affordable price point are consistently praised. Reviewers noted the absence of a second hand.

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.

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