Which is cheaper, the Helgray Kensington Quartz or the Seiko Prospex Sea The Black Series?

At MSRP the Helgray Kensington Quartz is the cheaper of the two at $299, against $765 for the Seiko Prospex Sea The Black Series — a $466 gap before any retailer discounting.

Which is bigger, the Helgray Kensington Quartz or the Seiko Prospex Sea The Black Series?

The Seiko Prospex Sea The Black Series wears larger at 45mm versus 38mm for the Helgray Kensington Quartz — a 7mm difference across the dial.

Which has better water resistance, the Helgray Kensington Quartz or the Seiko Prospex Sea The Black Series?

The Seiko Prospex Sea The Black Series is rated to 200m versus 50m for the Helgray Kensington Quartz.

Which has a longer power reserve, the Helgray Kensington Quartz or the Seiko Prospex Sea The Black Series?

The Seiko Prospex Sea The Black Series carries a 41-hour power reserve against 40 hours on the Helgray Kensington Quartz.

What movement does the Helgray Kensington Quartz run compared to the Seiko Prospex Sea The Black Series?

The Helgray Kensington Quartz runs a quartz caliber (Miyota GL22), while the Seiko Prospex Sea The Black Series runs a automatic (4R36).

Side by side

Helgray Kensington QuartzvsSeiko Prospex Sea The Black Series

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

Helgray Kensington Quartz

kensington

MSRP $299

Seiko Prospex Sea The Black Series

srpk43

MSRP $765

At a glance

13 of 29 specs differ

Diameter

Kensington Quartz38mm

Prospex Sea The Black Series45mm

Power Reserve

Kensington Quartz40h

Prospex Sea The Black Series41h

Water Resistance

Kensington Quartz50m

Prospex Sea The Black Series200m

MSRP

Kensington Quartz$299

Prospex Sea The Black Series$765

Full specifications

Case

6 specs

Crystal & Dial

2 specs

AR Coating

Inner

Anti-reflective coating on inner surface

Lume

Yes

LumiBrite on hands, index(es) and bezel

Movement

4 specs

Caliber

Miyota GL22

4R36

Type

Quartz

Automatic

Power Reserve

40h

41h

Jewels

Pricing

1 specs

MSRP

$299

$765

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