Which is cheaper, the Henry Archer Kvantum or the Seiko Prospex SPEEDTIMER Mechanical?

At MSRP the Seiko Prospex SPEEDTIMER Mechanical is the cheaper of the two at $995, against $2,199 for the Henry Archer Kvantum — a $1,204 gap before any retailer discounting.

Which is bigger, the Henry Archer Kvantum or the Seiko Prospex SPEEDTIMER Mechanical?

The Henry Archer Kvantum wears larger at 41mm versus 39.5mm for the Seiko Prospex SPEEDTIMER Mechanical — a 1.5mm difference across the dial.

Which has better water resistance, the Henry Archer Kvantum or the Seiko Prospex SPEEDTIMER Mechanical?

The Henry Archer Kvantum is rated to 50m versus 20m for the Seiko Prospex SPEEDTIMER Mechanical.

Which has a longer power reserve, the Henry Archer Kvantum or the Seiko Prospex SPEEDTIMER Mechanical?

The Seiko Prospex SPEEDTIMER Mechanical carries a 72-hour power reserve against 40 hours on the Henry Archer Kvantum.

What movement does the Henry Archer Kvantum run compared to the Seiko Prospex SPEEDTIMER Mechanical?

The Henry Archer Kvantum runs a quartz caliber (Seiko VK64), while the Seiko Prospex SPEEDTIMER Mechanical runs a automatic (6R55).

Side by side

Henry Archer KvantumvsSeiko Prospex SPEEDTIMER Mechanical

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

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Henry Archer Kvantum

5744002550563

MSRP $2,199

Seiko Prospex SPEEDTIMER Mechanical

spb513j1

MSRP $995

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At a glance

13 of 29 specs differ

Diameter

Kvantum41mm

Prospex SPEEDTIMER Mechanical39.5mm

Power Reserve

Kvantum40h

Prospex SPEEDTIMER Mechanical72h

Water Resistance

Kvantum50m

Prospex SPEEDTIMER Mechanical200m

MSRP

Kvantum$2,199

Prospex SPEEDTIMER Mechanical$995

Full specifications

Case

4 specs

Diameter

41mm

39.5mm

Lug-to-Lug

48mm

44.5mm

Material

316L Stainless Steel

Stainless Steel

Water Resistance

50m

200m

Crystal & Dial

4 specs

Crystal Shape

Flat

Curved

AR Coating

Inner

Anti-reflective coating on inner surface

Dial Color

Tan

Black

Lume

None

LumiBrite on hands and index(es)

Movement

4 specs

Caliber

Seiko VK64

6R55

Type

Quartz

Automatic

Power Reserve

40h

72h

Jewels

Pricing

1 specs

MSRP

$2,199

$995

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