Side by side

Bremont Altitude Perpetual Calendar GMTvsOak & Oscar The Jackson Big Eye

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
The Jackson Big Eye
Oak & OscarThe Jackson Big Eye
MSRP $3,150

At a glance

18 of 29 specs differ
Diameter
Altitude Perpetual Calendar GMT42mm
The Jackson Big Eye40mm
Power Reserve
Altitude Perpetual Calendar GMT40h
The Jackson Big Eye60 hoursh
Water Resistance
Altitude Perpetual Calendar GMT
The Jackson Big Eye50m
MSRP
Altitude Perpetual Calendar GMT$38,450
The Jackson Big Eye$3,150

Full specifications

Case

8 specs
Category
GMT
Chronograph
Diameter
42mm
40mm
Thickness
12.65mm
14mm
Lug-to-Lug
46.4mm
Lug Width
22mm
20mm
Material
Titanium
Stainless Steel
Finish
Brushed and polished
Brushed
Water Resistance
50m

Crystal & Dial

5 specs
Crystal Shape
Flat
Double-domed
AR Coating
Inner
Underside
Dial Color
Blue
White
Indices
Applied
Baton
Lume
None
Super-LumiNova

Movement

4 specs
Caliber
Eterna Caliber 39 (Cal. 3907M)
Type
Automatic
Manual
Beat Rate
28,800 vph
4 vph
Power Reserve
40h
60 hoursh

Pricing

1 specs
MSRP
$38,450
$3,150

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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.

Oak & Oscar The Jackson Big Eye

Oak & Oscar The Jackson Big Eye is praised for its balanced design and fine details, featuring a prominent "Big Eye" 30-minute sub-register for improved readability, reminiscent of vintage chronographs. It is powered by the Eterna EMC 3907M manual wind movement with a 60-hour power reserve, column wheel, and flyback function, housed in a 40mm stainless steel case. This limited edition of 50 pieces was priced at $3,150 and included two Horween leather straps and a wallet. On balance, reviewers highlight the Jackson Big Eye's enthusiast-spec chronograph function and readable subdial as key strengths.

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