Side by side

Formex Reef 39.5 mmvsLongines MASTER COLLECTION

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
MASTER COLLECTION
LonginesMASTER COLLECTION
MSRP $2,550

At a glance

20 of 29 specs differ
Diameter
Reef 39.5 mm39.5mm
MASTER COLLECTION40mm
Power Reserve
Reef 39.5 mm56h
MASTER COLLECTION72h
Water Resistance
Reef 39.5 mm300m
MASTER COLLECTION30m
MSRP
Reef 39.5 mm$2,230
MASTER COLLECTION$2,550

Full specifications

Case

8 specs
Category
Diver
Diameter
39.5mm
40mm
Thickness
11mm
9.35mm
Lug-to-Lug
45.5mm
46.8mm
Lug Width
22mm
21mm
Finish
Brushed and polished
Water Resistance
300m
30m
Caseback
Solid

Crystal & Dial

5 specs
Crystal Shape
Flat
AR Coating
Inner
Dial Color
Bahama Blue
Green
Indices
Applied
Lume
Super-LumiNova
None

Movement

6 specs
Caliber
Sellita SW300-1
L888.5
Beat Rate
28,800 vph
0 vph
Power Reserve
56h
72h
Jewels
25
0
Hacking
Yes
No
Hand-winding
Yes
No

Pricing

1 specs
MSRP
$2,230
$2,550

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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.

Longines MASTER COLLECTION

The Longines Master Collection is widely praised for its excellent value, with owners and reviewers highlighting its attractive finishing and classic, dressy styling. The L893 caliber offers a 72-hour power reserve, and the collection includes models with complications like annual calendars and moon phase chronographs at competitive prices. Some owners note that the bracelet lacks micro-adjustments for a perfect fit, and one reviewer found the case finishing homogenous with pushers that felt cheap. The Master Collection Chronograph is noted for its excellent fit and finish and vintage theme, while the Small Seconds variant's dial features engraved Breguet numerals but the subdial cuts off the "7" asymmetrically, and its case is considered slightly thicker than ideal. One owner reported the moon phase setting mechanism on their chronograph may require service, and the Annual Calendar variant has 30m water resistance.

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