Side by side

Formex Reef 39.5 mmvsLongines LONGINES SPIRIT ZULU TIME

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
LONGINES SPIRIT ZULU TIME
LonginesLONGINES SPIRIT ZULU TIME
MSRP $5,200

At a glance

11 of 29 specs differ
Diameter
Reef 39.5 mm39.5mm
LONGINES SPIRIT ZULU TIME39mm
Power Reserve
Reef 39.5 mm56h
LONGINES SPIRIT ZULU TIME40h
Water Resistance
Reef 39.5 mm300m
LONGINES SPIRIT ZULU TIME100m
MSRP
Reef 39.5 mm$2,230
LONGINES SPIRIT ZULU TIME$5,200

Full specifications

Case

6 specs
Category
Diver
GMT
Diameter
39.5mm
39mm
Thickness
11mm
13.5mm
Lug-to-Lug
45.5mm
46.8mm
Lug Width
22mm
21mm
Water Resistance
300m
100m

Crystal & Dial

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

Movement

2 specs
Caliber
Sellita SW300-1
L844.4
Power Reserve
56h
40h

Pricing

1 specs
MSRP
$2,230
$5,200

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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 SPIRIT ZULU TIME

Owners widely praise the Longines Spirit Zulu Time for its superb finishing, smooth crown action, and mesmerizing ceramic bezel, with many noting its premium pilot/sporty design and unique dial details. The movement is consistently lauded for its extreme accuracy, running at 0 to +1 second per day, and the watch is considered to offer remarkable value that punches above its price point. However, the bracelet is criticized by multiple sources for its push-pin adjustment and limited micro-adjustment holes, and the 42mm case size with a 49.3mm lug-to-lug is noted as potentially large for smaller wrists, though some users express a preference for the 39mm size. One owner reported their movement failed within the first year and found setting the date a "nightmare," while another owner notes minor criticisms like the date window being slightly off-center. On balance, owners and reviewers rate the Longines Spirit Zulu Time highly for its impressive finishing and accuracy at its price point.

From video reviewers

The 39mm case size is a significant strength, addressing previous concerns about thickness. The value proposition within the GMT market is also a shared positive point. No consensus on weaknesses was reached.

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