Which is cheaper, the Bremont Altitude Perpetual Calendar GMT or the Lum-Tec B64 Chronograph?

At MSRP the Lum-Tec B64 Chronograph is the cheaper of the two at $545, against $38,450 for the Bremont Altitude Perpetual Calendar GMT — a $37,905 gap before any retailer discounting.

Which is bigger, the Bremont Altitude Perpetual Calendar GMT or the Lum-Tec B64 Chronograph?

The Lum-Tec B64 Chronograph wears larger at 44mm versus 42mm for the Bremont Altitude Perpetual Calendar GMT — a 2mm difference across the dial.

Side by side

Bremont Altitude Perpetual Calendar GMTvsLum-Tec B64 Chronograph

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

Bremont Altitude Perpetual Calendar GMT

alt42-per-ti-bl-b

MSRP $38,450

Lum-Tec B64 Chronograph

b64-chronograph

MSRP $545

At a glance

9 of 29 specs differ

Diameter

Altitude Perpetual Calendar GMT42mm

B64 Chronograph44mm

Power Reserve

Altitude Perpetual Calendar GMT40h

B64 Chronograph40h

Water Resistance

Altitude Perpetual Calendar GMT—

B64 Chronograph100m

MSRP

Altitude Perpetual Calendar GMT$38,450

B64 Chronograph$545

Full specifications

Case

6 specs

Crystal & Dial

2 specs

Crystal

Sapphire

Domed Sapphire

Dial Color

Blue

Standard

Pricing

1 specs

MSRP

$38,450

$545

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