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 $3,000

At a glance

20 of 29 specs differ
Diameter
Reef 39.5 mm39.5mm
MASTER COLLECTION42mm
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$3,000

Full specifications

Case

8 specs
Category
Diver
Diameter
39.5mm
42mm
Thickness
11mm
10.8mm
Lug-to-Lug
45.5mm
49.7mm
Lug Width
22mm
21mm
Finish
Brushed and polished
Water Resistance
300m
30m
Caseback
Solid
Transparent case back with sapphire crystal

Crystal & Dial

4 specs
Crystal Shape
Flat
AR Coating
Inner
Dial Color
Bahama Blue
Silver
Indices
Applied
Painted Arabic numerals

Movement

7 specs
Caliber
Sellita SW300-1
L897.2
Beat Rate
28,800 vph
25,200 vph
Power Reserve
56h
72h
Jewels
25
0
Hacking
Yes
No
Hand-winding
Yes
No
Complications
None
Hours, minutes, seconds, month and date by annual calendar

Pricing

1 specs
MSRP
$2,230
$3,000

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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, beautiful dial execution featuring engraved Breguet numerals and snailed subdials, and classic, vintage styling. Owners and reviewers highlight its dressy and thin profile, with one owner noting its versatility as a daily wear. The Master Collection offers complications like chronographs and moon phases at competitive price points, with some finding the case finishing homogenous and the pushers to feel cheap. Accuracy figures are not consistently reported across sources, but one owner notes a broken moon phase setting mechanism requiring professional service. Water resistance is considered light at 30m, and the bracelet lacks micro-adjustments. Overall, owners and reviewers rate the Longines Master Collection highly for its dial execution and value, particularly when purchased below retail.

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