Side by side

Bremont Altitude Perpetual Calendar GMTvsFormex Reef 39.5 mm

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

Altitude Perpetual Calendar GMT
BremontAltitude Perpetual Calendar GMT
MSRP $38,450
Reef 39.5 mm
FormexReef 39.5 mm
MSRP $2,230

At a glance

11 of 29 specs differ
Diameter
Altitude Perpetual Calendar GMT42mm
Reef 39.5 mm39.5mm
Power Reserve
Altitude Perpetual Calendar GMT40h
Reef 39.5 mm56h
Water Resistance
Altitude Perpetual Calendar GMT
Reef 39.5 mm300m
MSRP
Altitude Perpetual Calendar GMT$38,450
Reef 39.5 mm$2,230

Full specifications

Case

6 specs
Category
GMT
Diver
Diameter
42mm
39.5mm
Thickness
12.65mm
11mm
Lug-to-Lug
45.5mm
Material
Titanium
Stainless Steel
Water Resistance
300m

Crystal & Dial

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

Movement

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

Pricing

1 specs
MSRP
$38,450
$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.

Bremont Altitude Perpetual Calendar GMT

The Bremont Altitude Perpetual Calendar GMT is a highly exclusive piece, with one owner noting its $44,000 price point raises questions about its target audience and suggesting it may be a limited production showpiece. Reviewers highlight its refined Trip-Tick case, now featuring softer curves, a 42mm diameter, and a 12.23mm thickness in grade 2 titanium, though the oversized crowns are flagged as a potential drawback. Overall, owners and reviewers acknowledge the Bremont Altitude Perpetual Calendar GMT as a distinctive, albeit niche, high-complication offering with a notable case refinement.

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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