Which is cheaper, the Sunrex 321 or the Timefactors Aerotimer?

At MSRP the Timefactors Aerotimer is the cheaper of the two at $416, against $600 for the Sunrex 321 — a $184 gap before any retailer discounting.

Which is bigger, the Sunrex 321 or the Timefactors Aerotimer?

The Timefactors Aerotimer wears larger at 42mm versus 38.6mm for the Sunrex 321 — a 3.4mm difference across the dial.

What movement does the Sunrex 321 run compared to the Timefactors Aerotimer?

The Sunrex 321 runs a solar caliber (Epson VS76A), while the Timefactors Aerotimer runs a mecaquartz (Seiko VK64 (Meca-Quartz)).

Side by side

Sunrex 321vsTimefactors Aerotimer

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

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Sunrex 321

321-racer

MSRP $600

See the full 321

Timefactors Aerotimer

precista-prs-45-aerotimer

MSRP $416

See the full Aerotimer

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Buy from Timefactors ↗

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At a glance

10 of 29 specs differ

Diameter

32138.6mm

Aerotimer42mm

Power Reserve

32140h

Aerotimer—

Water Resistance

321100m

Aerotimer100m

MSRP

321$600

Aerotimer$416

Full specifications

Case

4 specs

Diameter

38.6mm

42mm

Thickness

14mm

13mm

Lug-to-Lug

43.5mm

50mm

Material

Aluminum

Stainless Steel

Crystal & Dial

2 specs

AR Coating

Yes

Inner

Lume

None

SuperLuminova C3

Movement

3 specs

Caliber

Epson VS76A

Seiko VK64 (Meca-Quartz)

Type

Solar

Mecaquartz

Power Reserve

40h

—

Pricing

1 specs

MSRP

$600

$416

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